US3205080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beryllia-silicon carbide ceramic bodies
Assignee: National Beryllia Corp
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Filing: 1964-10-19
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Granted: 1965-09-07
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Expires: 1984-10-19
Abstract
No abstract record available.
Inventors
- 👤 Eugene I Ryshkewitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:26
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
SHAPED AND SINTERED REFRACTORY BODIES SHOWING SUBSTANTIALLY NO INTERFACIAL FLAWS BETWEEN THE SINTERED PARTICLES CONSISTING ESSENTIALLY OF SILICON CARBIDE AND BERYLLIA IN THE PROPORTIONS BY VOLUME OF SIC/BEO OF BETWEEN 15:85 TO 85:15.
Claim 2
Dependent Claim
33 words
SHAPED AND SINTERED REFRACTORY BODIES SHOWING SUBSTANTIALLY NO INTERFACIAL FLAWS BETWEEN THE SINTERED PARTICLES CONSISTING ESSENTIALLY OF SILICON CARBIDE AND BERYLLIA IN THE PROPORTIONS BY VOLUME OF SIC/BEO OF BETWEEN 15:85 TO 85:15.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |