US2885826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-to-metal seals
Assignee: British Thomson Houston Co Ltd
•
Filing: 1955-11-18
•
Granted: 1959-05-12
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Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 Grieve Alexander
- 👤 Scott William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:49
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046; H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF PRODUCING A HERMETIC SEAL BETWEEN A BORO-SILICATE GLASS AND METAL MEMBER COMPOSED OF AN ALLOWY OF COBALT, NICKEL AND IRON AND HAVING A THERMAL EXPANSION CHARACTERISTIC WHICH IS SUITABLY MATCHED TO THAT OF THE GLASS, PROTECTING THE MATERIALS AGAINST THE CORROSIVE EFFECT OF A HUMID ATMOSPHERE WHICH CONSIST IN FIRING THE METAL MEMBER IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE OVER 900*C., ELECTROLYTICALLY FORMING A COATING OF RHODIUM ON THE METAL MEMBER AT LEAST OVER THE REGION OF THE INTENDED SEAL OF MAXIMUM THICKNESS OF ONE TEN-THOUSANDTH OF AN INCH, AND THEN FORMING THE SEAL BETWEEN THE GLASS AND THE COATED METAL MEMBER.
Claim 2
Independent Claim
107 words
THE METHOD OF PRODUCING A HERMETIC SEAL BETWEEN A BORO-SILICATE GLASS AND METAL MEMBER COMPOSED OF AN ALLOWY OF COBALT, NICKEL AND IRON AND HAVING A THERMAL EXPANSION CHARACTERISTIC WHICH IS SUITABLY MATCHED TO THAT OF THE GLASS, PROTECTING THE MATERIALS AGAINST THE CORROSIVE EFFECT OF A HUMID ATMOSPHERE WHICH CONSIST IN FIRING THE METAL MEMBER IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE OVER 900*C., ELECTROLYTICALLY FORMING A COATING OF RHODIUM ON THE METAL MEMBER AT LEAST OVER THE REGION OF THE INTENDED SEAL OF MAXIMUM THICKNESS OF ONE TEN-THOUSANDTH OF AN INCH, AND THEN FORMING THE SEAL BETWEEN THE GLASS AND THE COATED METAL MEMBER.
References Cited (Backward Citations)
US1189194A
Cited
US1232074A
Cited
US1947180A
Cited
US1949131A
Cited
US2053765A
Cited
US2109138A
Cited
US2684886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |