Patent DE93173C successfully refreshed from Google Patents.
Patent US4401766A successfully refreshed from Google Patents.
US4401766A
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US
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Ceramic seal between spaced members such as a terminal pin and a ferrule
Assignee: PACIFIC COAST TECHNOLOGIES Inc A WA CORP
•
Filing: 1982-04-27
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Granted: 1983-08-30
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Expires: 2002-04-27
Abstract
Abstract Acid and alkali oxides are smelted for an extended period of time at a first elevated temperature above their melting temperatures. The smelted mixture is then quenched in water and fritted. The fritted mixture is then disposed between a pair of members which are to be hermetically sealed relative to each other. The fritted mixture is then at least partially fused in an oxygen atmosphere at a second temperature below the first temperature for a relatively short period of time. The at least partially fused mixture is then rapidly cooled in air. In this way, the mixture is provided with a partially amorphous state and a partially crystalline state. The crystals in the mixture are disposed primarily at the borders of at least a particular one of the members to be sealed. The mixture hermetically seals the two members, is resistant to acids and alkalis and inhibits the propagation of cracks. The mixture is particularly adapted to seal steels such as stainless steels and steel alloys including cobalt and molybdenum or including nickel and chromium. The mixture is also adapted to seal noble metals such as platinum and also alloys such as those including nickel.
Inventors
- 👤 James C. Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:03
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/305; C; C03; C03C; C03C27/00; C03C27/02; C03C8/00; C03C8/02; C03C8/10; C03C8/12; C03C8/24
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
63 words
In an electrical insulating material having properties of producing a hermetic seal, the combination of the following materials in the following range of percentages by weight: ______________________________________
Range of Relative Percentages
Material by Weight
______________________________________
Lead oxide (PbO) 28-32
Silicon dioxide (SiO.sub.2)
38-42
Boric oxide (B.sub.2 O.sub.3)
2-4
Aluminum oxide (Al.sub.2 O.sub.3)
1-2
Manganese oxide (MnO)
6-11
Sodium oxide (Na.sub.2 O)
13-16
______________________________________
Claim 2
Dependent Claim
63 words
In an electrical insulating material having properties of producing a hermetic seal, the combination of the following materials in the following range of percentages by weight: ______________________________________
Range of Relative Percentages
Material by Weight
______________________________________
Lead oxide (PbO) 28-32
Silicon dioxide (SiO.sub.2)
38-42
Boric oxide (B.sub.2 O.sub.3)
2-4
Aluminum oxide (Al.sub.2 O.sub.3)
1-2
Manganese oxide (MnO)
6-11
Sodium oxide (Na.sub.2 O)
13-16
______________________________________
Claim 3
Dependent Claim
26 words
The combination set forth in claim 1 including the following additional material: ______________________________________
Range of Relative Percentages
Material by Weight
______________________________________
Molybdic oxide (MoO.sub.3)
0.5-3
______________________________________
Claim 4
Dependent Claim
41 words
The combination set forth in claim 1 including the following additional material: ______________________________________
Range of Relative Percentages
Material by Weight
______________________________________
At least one oxide selected
3-12
from a group consisting of
zirconium spinel, zirconium
silicate and zinc zirconium
silicate.
______________________________________
Claim 5
Dependent Claim
44 words
The combination set forth in claim 1 including the following additional material: ______________________________________
Range of Relative Percentages
Material by Weight
______________________________________
At least one oxide selected
1.5-3
from a group consisting of
cobalt oxide, nickel oxide,
chromium oxide, copper oxide
and vanadium oxide.
______________________________________
Claim 6
Dependent Claim
68 words
The combination set forth in claim 1 including the following additional materials: ______________________________________
Range of Relative Percentages
Material by Weight
______________________________________
Molybdic oxide (MoO.sub.3),
0.5-3
at least one oxide selected
3-12
from a group consisting of
zirconium spinel, zirconium
silicate and zinc zirconium
silicate, and
at least one oxide selected
1.5-3
from a group consisting of
cobalt oxide, nickel oxide,
chromium oxide, copper oxide
and vanadium oxide.
______________________________________
Claim 7
Dependent Claim
30 words
The combination set forth in claim 1 wherein the lead oxide, the silicon dioxide and the boric oxide act as a flux to decrease the melting temperature of the material.
Claim 8
Dependent Claim
55 words
The combination set forth in claim 1 wherein the insulating material is partially amorphous and partially crystalline and has the properties of providing a hermetic seal through more than one reheating in an oxygen atmosphere at a temperature of approximately 1500° F. to 1600° F. for a period of time to approximately thirty (30) minutes.
Claim 9
Dependent Claim
29 words
The combination set forth in claim 7 wherein the insulating material has an electrical resistivity to approximately 10 18 ohms and is highly resistant to strong acids and bases.
Claim 10
Dependent Claim
46 words
The combination set forth in claim 8 including the following additional material in the electrical insulating material: ______________________________________
Range of Relative
Material Percentages by Weight
______________________________________
At least one oxide selected from
3-12
a group consisting of zirconium
spinel, zirconium silicate and
zinc zirconium silicate
______________________________________
Claim 11
Dependent Claim
30 words
The combination set forth in claim 9 including the following additional material in the electrical insulating material: ______________________________________
Range of Relative
Material Percentages by Weight
______________________________________
Molybdic oxide
0.5-3
______________________________________
Claim 12
Dependent Claim
49 words
The combination set forth in claim 10 including the following additional material in the electrical insulating material: ______________________________________
Range of Relative
Material Percentages by Weight
______________________________________
At least one oxide selected from
1.5-3
a group consisting of cobalt oxide,
nickel oxide, chromium oxide, copper
oxide and vanadium oxide
______________________________________
Claim 13
Dependent Claim
78 words
A glass frit formed by mixing the following materials and then smelting the mixture at a temperature of about 1800° F. to 1900° F. for a period of approximately four (4) or five (5) hours and then quenching the smelted mixture in water: ______________________________________
Material Range of Materials by Weight
______________________________________
Lead oxide (PbO)
28-32
Silicon Dioxide (SiO.sub.2)
38-42
Sodium oxide (Na.sub.2 O)
13-16
Alumina (Al.sub.2 O.sub.3)
1-2
Boric oxide (B.sub.2 O.sub.3)
2-4
Manganese oxide (MnO)
6-11
______________________________________
Claim 14
Dependent Claim
78 words
A glass frit formed by mixing the following materials and then smelting the mixture at a temperature of about 1800° F. to 1900° F. for a period of approximately four (4) or five (5) hours and then quenching the smelted mixture in water: ______________________________________
Material Range of Materials by Weight
______________________________________
Lead oxide (PbO)
28-32
Silicon Dioxide (SiO.sub.2)
38-42
Sodium oxide (Na.sub.2 O)
13-16
Alumina (Al.sub.2 O.sub.3)
1-2
Boric oxide (B.sub.2 O.sub.3)
2-4
Manganese oxide (MnO)
6-11
______________________________________
Claim 15
Dependent Claim
19 words
A glass frit as set forth in claim 12 wherein the glass frit is partially amorphous and partially crystalline.
Claim 16
Dependent Claim
21 words
A glass frit as set forth in claim 13 wherein the glass frit is highly resistant to strong acids and bases.
Claim 17
Dependent Claim
23 words
A glass frit as set forth in claim 13 wherein the glass frit has an electrical resistivity as high as 10 18 ohms.
Claim 18
Dependent Claim
42 words
A glass frit as set forth in claim 13 wherein the glass frit can be fused to members by heating in an oxygen atmosphere at a temperature of approximately 1500° F. to 1600° F. for a period of approximately thirty (30) minutes.
Claim 19
Dependent Claim
44 words
A glass frit as set forth in claim 13 including at least one oxide selected from a group consisting of cobalt oxide, nickel oxide, chromium oxide, copper oxide and vanadium oxide and having a range of percentages by weight between approximately 1.5% and 3%.
Claim 20
Dependent Claim
22 words
A glass frit as set forth in claim 13 including molybdic oxide in the range of approximately 0.5% to 3% by weight.
Claim 21
Dependent Claim
42 words
A glass frit as set forth in claim 13 including at least one material selected from the group consisting of zirconium spinel, zirconium silicate and zinc zirconium silicate and having a percentage by weight in the range of approximately 3% to 12%.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |