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US3973975A
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US
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PbO-containing sealing glass with higher oxide of a cation to avoid PbO reduction
Assignee: OI Glass Inc
•
Filing: 1974-10-22
•
Granted: 1976-08-10
•
Expires: 1994-10-22
Abstract
Abstract A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains an effective amount of a powder, such as Pb3O4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. Among other powders similarly found to be effective for the purpose of prevention of reduction of PbO in a PbO-containing sealing glass frit are certain other higher oxides of a cation which are selected from a group including, in addition to Pb3O4, such higher oxides of a cation as BaO2, CrO3, MnO2, Mn2O3, Fe2O3, Fe3O4, CuO, Cu2O, Tl2O3, Sb2O5, TeO2, Ta2O5, Nb2O5, V2O5, CeO2, Bi2O3 and As2O5. A sealing glass paste consisting essentially of a PbO- B2O3-ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb3O4, BaO2 or other of the mentioned higher oxide of a cation powder in the solder glass and paste made therewith, which Pb3O4, BaO2 or other of the mentioned higher oxides of a cation will be slowly reduced to a lower oxide in a reducing atmosphere during the sealing of the television tube components. A method for increasing the dielectric properties of a PbO-containing sealing glass paste and the devitrified seal made therefrom, which seals the face plate to the funnel of a color television tube, to a value greater than that provided by the solder glass, per se, by incorporating in the solder glass and the solder glass paste made therefrom a small but sufficient amount of Pb3O4, BaO2 or other of the mentioned higher oxide of a cation powders to accomplish this purpose. A vehicle for a glass frit comprises hydroxypropyl cellulose as a binder and a solvent for said binder.
Inventors
- 👤 Josef Francel
- 👤 James E. King
- 👤 John M. Woulbroun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:03
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/074; C03C3/0745; C03C27/00; C03C27/06; C03C27/10; C03C8/00; C03C8/24; C03C8/245
Claims Analysis
Total Claims: 116
Claim 1
Independent Claim
190 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass frit is unreduced when said sealing glass frit is fired in the presence of reducing conditions and at temperatures at which said sealing glass frit seals said glass surfaces together, said improvement comprising incorporating in said sealing glass frit a sufficient amount of a powder of a higher oxide of a cation which is stable at the temperatures at which said sealing glass frit seals said glass surfaces together and which can be reduced to a lower oxide of the cation when exposed to said reducing conditions, said lower oxide of said cation being compatible with the fired sealing glass, said higher oxide of said cation being selected from the group consisting of Pb 3 O 4 , BaO 2 , MnO 2 , Mn 2 O 3 , Fe 3 O 4 , CuO, Cu 2 O, Tl 2 O 3 , TeO 2 , Ta 2 O 5 , Nb 2 O 5 , V 2 O 5 , CeO 2 and Bi 2 O 3 .
Claim 2
Dependent Claim
190 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass frit is unreduced when said sealing glass frit is fired in the presence of reducing conditions and at temperatures at which said sealing glass frit seals said glass surfaces together, said improvement comprising incorporating in said sealing glass frit a sufficient amount of a powder of a higher oxide of a cation which is stable at the temperatures at which said sealing glass frit seals said glass surfaces together and which can be reduced to a lower oxide of the cation when exposed to said reducing conditions, said lower oxide of said cation being compatible with the fired sealing glass, said higher oxide of said cation being selected from the group consisting of Pb 3 O 4 , BaO 2 , MnO 2 , Mn 2 O 3 , Fe 3 O 4 , CuO, Cu 2 O, Tl 2 O 3 , TeO 2 , Ta 2 O 5 , Nb 2 O 5 , V 2 O 5 , CeO 2 and Bi 2 O 3 .
Claim 3
Dependent Claim
28 words
In a PbO-containing sealing glass frit as defined in claim 1, the improvement wherein said higher oxide of a cation is a higher oxide of a metallic cation.
Claim 4
Dependent Claim
30 words
A PbO-containing sealing glass frit according to claim 1 having incorporated therein from about 0.1 to about 3% of said powder based upon the weight of said sealing glass frit.
Claim 5
Dependent Claim
56 words
A sealing glass frit according to claim 1 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3
______________________________________ and having incorporated therein from about 0.1 to about 3% of said powder based upon the weight of said sealing glass frit.
Claim 6
Dependent Claim
31 words
A sealing glass frit as defined in claim 4, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 7
Dependent Claim
32 words
A sealing glass frit according to claim 1 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub. O.sub.3 8.3
SiO.sub.2 2.1
BaO 2.
______________________________________
Claim 8
Dependent Claim
32 words
A sealing glass frit according to claim 1 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6.
______________________________________
Claim 9
Dependent Claim
35 words
A sealing glass frit according to claim 1 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 10
Dependent Claim
85 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising incorporating in said sealing glass an amount of Pb 3 O 4 powder sufficient to prevent reduction of the PbO in said sealing glass during sealing in the presence of said reducing conditions.
Claim 11
Dependent Claim
85 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising incorporating in said sealing glass an amount of Pb 3 O 4 powder sufficient to prevent reduction of the PbO in said sealing glass during sealing in the presence of said reducing conditions.
Claim 12
Dependent Claim
27 words
A PbO-containing sealing glass frit having incorporated therein from about 0.1 to 1.5% Pb 3 O 4 powder based upon the weight of said sealing glass frit.
Claim 13
Dependent Claim
27 words
A PbO-containing sealing glass frit having incorporated therein from about 0.1 to 1.5% Pb 3 O 4 powder based upon the weight of said sealing glass frit.
Claim 14
Dependent Claim
53 words
A sealing glass frit consisting essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3
______________________________________ and having incorporated therein from about 0.1 to 1.5% Pb 3 O 4 powder based upon the weight of said sealing glass frit.
Claim 15
Dependent Claim
53 words
A sealing glass frit consisting essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3
______________________________________ and having incorporated therein from about 0.1 to 1.5% Pb 3 O 4 powder based upon the weight of said sealing glass frit.
Claim 16
Dependent Claim
34 words
A sealing glass frit as defined in claim 11, wherein said Pb 3 O 4 powder is present in an amount of from about 0.25 to 0.7% by weight of said sealing glass frit.
Claim 17
Dependent Claim
31 words
A sealing glass frit as defined in claim 11, wherein said Pb 3 O 4 powder is present in an amount of about 0.5% by weight of said sealing glass frit.
Claim 18
Dependent Claim
56 words
A sealing glass frit according to claim 9 consisting essentially of CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3
______________________________________ and having incorporated therein from about 0.1 to about 3% of said powder based upon the weight of said sealing glass frit.
Claim 19
Dependent Claim
31 words
A sealing glass frit as defined in claim 14, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 20
Dependent Claim
33 words
A sealing glass frit according to claim 9 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 21
Dependent Claim
32 words
A sealing glass frit according to claim 9 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6.
______________________________________
Claim 22
Dependent Claim
35 words
A sealing glass frit according to claim 9 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 23
Dependent Claim
90 words
In a PbO-containing seaing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions and at temperatures from about 400°C at which said sealing glass frit seals said glass surfaces together, said improvement comprising incorporating in said sealing glass an amount of BaO 2 powder sufficient to prevent reduction of the PbO in said sealing glass during sealing in the presence of said reducing conditions.
Claim 24
Dependent Claim
90 words
In a PbO-containing seaing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions and at temperatures from about 400°C at which said sealing glass frit seals said glass surfaces together, said improvement comprising incorporating in said sealing glass an amount of BaO 2 powder sufficient to prevent reduction of the PbO in said sealing glass during sealing in the presence of said reducing conditions.
Claim 25
Dependent Claim
40 words
A sealing glass frit according to claim 19 in which said sealing glass consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 26
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of BaO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 27
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of BaO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 28
Dependent Claim
32 words
A sealing glass frit according to claim 21 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6.
______________________________________
Claim 29
Dependent Claim
35 words
A sealing glass frit according to claim 21 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 30
Dependent Claim
31 words
A sealing glass frit as defined in claim 21, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 31
Dependent Claim
31 words
A sealing glass frit as defined in claim 24, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 32
Dependent Claim
33 words
A sealing glass frit according to claim 21 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 33
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of MnO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 34
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of MnO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 35
Dependent Claim
35 words
A sealing glass frit according to claim 27 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 36
Dependent Claim
33 words
A sealing glass frit according to claim 27 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 37
Dependent Claim
30 words
A PbO-containing sealing glass frit according to claim 27, wherein said powder is present in an amount from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 38
Dependent Claim
31 words
A sealing glass frit as defined in claim 30, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 39
Dependent Claim
33 words
A sealing glass frit according to claim 27 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 40
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Mn 2 O 3 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 41
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Mn 2 O 3 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 42
Dependent Claim
35 words
A sealing glass frit according to claim 33 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 43
Dependent Claim
33 words
A sealing glass frit according to claim 33 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 44
Dependent Claim
30 words
A PbO-containing sealing glass frit according to claim 33, wherein said powder is present in an amount from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 45
Dependent Claim
31 words
A sealing glass frit as defined in claim 36, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 46
Dependent Claim
33 words
A sealing glass frit according to claim 33 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 47
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Fe 3 O 4 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 48
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Fe 3 O 4 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 49
Dependent Claim
35 words
A sealing glass frit according to claim 39 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 50
Dependent Claim
33 words
A sealing glass frit according to claim 39 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 51
Dependent Claim
31 words
A sealing glass frit as defined in claim 39, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 52
Dependent Claim
31 words
A sealing glass frit as defined in claim 42, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 53
Dependent Claim
33 words
A sealing glass frit according to claim 39 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 54
Dependent Claim
85 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of CuO powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 55
Dependent Claim
85 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of CuO powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 56
Dependent Claim
35 words
A sealing glass frit according to claim 45 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 57
Dependent Claim
33 words
A sealing glass frit according to claim 45 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 58
Dependent Claim
31 words
A sealing glass frit as defined in claim 45, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 59
Dependent Claim
31 words
A sealing glass frit as defined in claim 48, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 60
Dependent Claim
33 words
A sealing glass frit according to claim 45 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 61
Dependent Claim
87 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealng glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Cu 2 O powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 62
Dependent Claim
87 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealng glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Cu 2 O powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 63
Dependent Claim
35 words
A sealing glass frit according to claim 51 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 64
Dependent Claim
33 words
A sealing glass frit according to claim 51 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 65
Dependent Claim
31 words
A sealing glass frit as defined in claim 51, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 66
Dependent Claim
31 words
A sealing glass frit as defined in claim 54, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 67
Dependent Claim
33 words
A sealing glass frit according to claim 51 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 68
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Tl 2 O 3 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 69
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Tl 2 O 3 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 70
Dependent Claim
35 words
A sealing glass frit according to claim 57, consisting essentially of: CONSTITUENTS PERCENTAGE OF WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 71
Dependent Claim
33 words
A sealing glass frit according to claim 57 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 72
Dependent Claim
31 words
A sealing glass frit as defined in claim 57, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 73
Dependent Claim
31 words
A sealing glass frit as defined in claim 60, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 74
Dependent Claim
33 words
A sealing glass frit according to claim 57 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 75
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of TeO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 76
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of TeO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 77
Dependent Claim
35 words
A sealing glass frit according to claim 63 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 78
Dependent Claim
33 words
A sealing glass frit according to claim 63 in which said frit consists essentially of: CONSTITUENTS PERCENT OF WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 79
Dependent Claim
31 words
A sealing glass frit as defined in claim 63, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 80
Dependent Claim
31 words
A sealing glass frit as defined in claim 66, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 81
Dependent Claim
33 words
A sealing glass frit according to claim 63 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 82
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO is said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit and amount of Ta 2 O 5 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 83
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO is said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit and amount of Ta 2 O 5 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 84
Dependent Claim
35 words
A sealing glass frit according to claim 69 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 85
Dependent Claim
33 words
A sealing glass frit according to claim 69 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 86
Dependent Claim
31 words
A sealing glass frit as defined in claim 69, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 87
Dependent Claim
30 words
A sealing glass frit as defined in claim 72, wherein said powder is present in an amount of from about 0.2 to 1.5% by weight of said sealing glass frit.
Claim 88
Dependent Claim
33 words
A sealing glass frit according to claim 69, in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 89
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Nb 2 O 5 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 90
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Nb 2 O 5 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 91
Dependent Claim
35 words
A sealing glass frit according to claim 75 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 92
Dependent Claim
33 words
A sealing glass frit according to claim 75 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 93
Dependent Claim
31 words
A sealing glass frit as defined in claim 75, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 94
Dependent Claim
31 words
A sealing glass frit as defined in claim 78, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 95
Dependent Claim
33 words
A sealing glass frit according to claim 75 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 96
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of V 2 O 5 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 97
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of V 2 O 5 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 98
Dependent Claim
35 words
A sealing glass frit according to claim 81 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 99
Dependent Claim
33 words
A sealing glass frit according to claim 81 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 100
Dependent Claim
31 words
A sealing glass frit as defined in claim 81, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 101
Dependent Claim
31 words
A sealing glass frit as defined in claim 84, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 102
Dependent Claim
33 words
A sealing glass frit according to claim 81 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 103
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of CeO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 104
Dependent Claim
86 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of CeO 2 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 105
Dependent Claim
35 words
A sealing glass frit according to claim 87 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 106
Dependent Claim
33 words
A sealing glass frit according to claim 87 in which said frit consists essentially of: CONSTITUENTS PERCENT BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 107
Dependent Claim
31 words
A sealing glass frit as defined in claim 87, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 108
Dependent Claim
31 words
A sealing glass frit as defined in claim 90, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 109
Dependent Claim
33 words
A sealing glass frit according to claim 87 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
Claim 110
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Bi 2 O 3 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 111
Dependent Claim
88 words
In a PbO-containing sealing glass frit for sealing two glass surfaces together, the improvement wherein the PbO in said sealing glass is prevented from being reduced when said sealing glass is being fired in the presence of reducing conditions at a temperature sufficient to seal said glass surfaces together, said improvement comprising having intermixed with said sealing glass frit an amount of Bi 2 O 3 powder sufficient to prevent reduction of the PbO in said sealing glass frit during sealing in the presence of said reducing conditions.
Claim 112
Dependent Claim
35 words
A sealing glass frit according to claim 93 consisting essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75 - 82
ZnO 7 - 14
B.sub.2 O.sub.3 6.5 - 12
SiO.sub.2 1.5 - 3 .
______________________________________
Claim 113
Dependent Claim
33 words
A sealing glass frit according to claim 93 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 84
ZnO 2.7
B.sub.2 O.sub.3 12.3
SiO.sub.2 0.4
BaO 0.6 .
______________________________________
Claim 114
Dependent Claim
31 words
A sealing glass frit as defined in claim 93, wherein said powder is present in an amount of from about 0.1 to about 3% by weight of said sealing glass frit.
Claim 115
Dependent Claim
31 words
A sealing glass frit as defined in claim 96, wherein said powder is present in an amount of from about 0.2 to about 1.5% by weight of said sealing glass frit.
Claim 116
Dependent Claim
33 words
A sealing glass frit according to claim 93 in which said frit consists essentially of: CONSTITUENTS PERCENTAGE BY WEIGHT
______________________________________
PbO 75
ZnO 12.6
B.sub.2 O.sub.3 8.3
SiO.sub.2 2.1
BaO 2. .
______________________________________
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |