Patent US2695241A successfully refreshed from Google Patents.
US2695241A
Expired / Lapsed
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Sealing ceramic and its method of production
Assignee: Thales SA
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Filing: 1951-05-24
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Granted: 1954-11-23
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Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Calis Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:50
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/195
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
52 words
A CERAMIC MATERIAL HAVING A COEFFICIENT OF EXPANSION BETWEEN 38 AND 45X10-7 AND BEING ADAPTED TO FORM AIRTIGHT SEALS WITH GLASS, METALS AND OTHER CERAMICS, SAID CERAMIC MATERIAL ESSENTIALLY CONSISTING OF 50-60% BY WEIGHT ALUMINA AND 33-38% BY WEIGHT SILICA, THE BALANCE BEING FLUXES, SAID CERAMIC MATEIAL BEING FREE OF ALKALI OXIDES.
References Cited (Backward Citations)
US700673A
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US1760360A
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FR606025A
Cited
US1786482A
Cited
GB315856A
Cited
GB404588A
Cited
US2105166A
Cited
US2317855A
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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) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |