US3108886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard, refractory crystalline materials
Assignee: Unifrax I LLC
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Filing: 1958-12-29
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Granted: 1963-10-29
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert F Adamsky
- 👤 Carl F Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C01; C01B; C01B35/00; C01B35/02; C01B35/04; C04B14/00; C04B14/02; C04B14/32; C04B35/622; C04B35/64; C04B35/65; G; G21; G21F; G21F1/00; G21F1/02; G21F1/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A TERNARY BORIDE COMPOSITION OF SILICON, BORON AND CARBON IN WHICH THE CHEMICALLY COMBINED BORON CONTENT AMOUNTS TO AT LEAT 80% BY WEIGHT, THE CHEMICALLY COMBINED SILICON CONTENT AMOUNTS TO 6 TO 20% BY WEIGHT AND THE CARBON CONTENT AMOUNTS TO UP TO 8% BY WEIGHT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |