Patent US3997312A successfully refreshed from Google Patents.
US3997312A
Expired / Lapsed
US
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Method of manufacturing colored glass articles
Assignee: US Philips Corp
•
Filing: 1975-04-02
•
Granted: 1976-12-14
•
Expires: 1995-04-02
Abstract
Abstract A method of manufacturing colored pressed glass articles by indiffusion of ions under reducing conditions, in which method before the indiffusion a layer having a thickness of at least 10 μm is removed by etching with HF.
Inventors
- 👤 Lucas Besselink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:45
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/008; C03C14/00; C03C14/006; C03C4/00; C03C4/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A method of manufacturing glass articles, comprising the steps of: providing a pressed glass face-plate panel for an infrared radiator consisting essentially of in percent by weight: ______________________________________
SiO.sub.2
77.4 Li.sub.2 O
0.2
B.sub.2 O.sub.3
14.9 Al.sub.2 O.sub.3
1.5
Na.sub.2 O
4.5 F 0.2
K.sub.2 O
0.3 As.sub.2 O.sub.3
1.0
______________________________________ subjecting the surface of said panel to the action of an etching solution containing hydrofluroic acid, so that a surface layer of at least 10 μm is removed by etching; coating said etched panel with a paste containing a silver compound; and heating said coated panel so as to diffuse ions from said paste into said panel under reducing conditions, thereby producing a red color in said panel.
Claim 2
Independent Claim
119 words
A method of manufacturing glass articles, comprising the steps of: providing a pressed glass face-plate panel for an infrared radiator consisting essentially of in percent by weight: ______________________________________
SiO.sub.2
77.4 Li.sub.2 O
0.2
B.sub.2 O.sub.3
14.9 Al.sub.2 O.sub.3
1.5
Na.sub.2 O
4.5 F 0.2
K.sub.2 O
0.3 As.sub.2 O.sub.3
1.0
______________________________________ subjecting the surface of said panel to the action of an etching solution containing hydrofluroic acid, so that a surface layer of at least 10 μm is removed by etching; coating said etched panel with a paste containing a silver compound; and heating said coated panel so as to diffuse ions from said paste into said panel under reducing conditions, thereby producing a red color in said panel.
Claim 3
Dependent Claim
14 words
A method as defined in claim 1, wherein said silver compound is silver sulphate.
Claim 4
Dependent Claim
26 words
A method as defined in claim 1, wherein said heating step is performed at a temperature of approximately 520° C for about 10 to 15 minutes.
Claim 5
Dependent Claim
80 words
A method as defined in claim 3, wherein said coating step comprises utilizing a paste consisting essentially of: ______________________________________
6.7 kg of silver sulphate
14.63 kg of MnO.sub.2
14.63 kg of Fe.sub.2 O.sub.3
19.8 l of monoethylglycolether
5.7 l of acetone
3.8 l of a solution which contains 600 g
nitrocellulose in a mixture of 12 l
of monoethylglycolether and 480 ml
of acetone
1.52 l of a solution of 1.5 kg of camphor
in 2.5 l of xylene
______________________________________
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |