US2836935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of molybdenum and tungsten for glass sealing
Assignee: British Thomson Houston Co Ltd
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Filing: 1952-06-12
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Granted: 1958-06-03
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Expires: 1972-06-12
Abstract
No abstract record available.
Inventors
- 👤 John E Stanworth
- 👤 Rawson Harold
- 👤 Knowles Mary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:42
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF MAKING GLASS-TO-METAL SEALS WHICH ARE FREE FROM THE OXIDE OF THE METAL WHICH COMPRISES THE STEPS OF SELECTING A METAL FROM THE CLASS CONSISTING OF MOLYBDENUM AND TUNGSTEN, PASSING A VOLATILE HALIDE OF SILICON OVER THE METAL AT A TEMPERATURE OF 1200-1400* C. FOR A TIME RANGING FROM ONE-HALF TO TWO HOURS IN THE PRESENCE OF HYDROGEN UNTIL THE SURFACE OF THE METAL IS COVERED WITH A FILM OF THE SILICIDE OF THE METAL, AND THEN SEALING THE METAL SO TREATED INTO THE GLASS.
Claim 2
Independent Claim
87 words
A METHOD OF MAKING GLASS-TO-METAL SEALS WHICH ARE FREE FROM THE OXIDE OF THE METAL WHICH COMPRISES THE STEPS OF SELECTING A METAL FROM THE CLASS CONSISTING OF MOLYBDENUM AND TUNGSTEN, PASSING A VOLATILE HALIDE OF SILICON OVER THE METAL AT A TEMPERATURE OF 1200-1400* C. FOR A TIME RANGING FROM ONE-HALF TO TWO HOURS IN THE PRESENCE OF HYDROGEN UNTIL THE SURFACE OF THE METAL IS COVERED WITH A FILM OF THE SILICIDE OF THE METAL, AND THEN SEALING THE METAL SO TREATED INTO THE GLASS.
References Cited (Backward Citations)
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Cited
US1774410A
Cited
US1885562A
Cited
AT117856B
Cited
GB383681A
Cited
US2239551A
Cited
US2501051A
Cited
US2536774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |