Patent US2916460A successfully refreshed from Google Patents.
US2916460A
Expired / Lapsed
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Silicon carbide resistance bodies and methods of making same
Assignee: Unifrax I LLC
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Filing: 1956-06-28
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Granted: 1959-12-08
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Roland R Van Der Beck Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:26
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/048; H01B; H01B1/00; H01B1/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A METHOD OF MAKING RECRYSTALLIZED SILICON CARBIDE THERMISTOR BODIES WHICH COMPRISES FORMING A BODY OF THE DESIRED SHAPE FROM A MIXTURE OF SILICON CARBIDE PARTICLES AND A SUFFICIENT BUT SMALL AMOUNT OF BORON COMPOUND TO PROVIDE ABOUT 0.20 TO ABOUT 0.34% BY WEIGHT BORON IN THE LATTICE OF THE SILICON CARBIDE WHEN RECRYSTALLIZED, AND FIRING THE RESULTING SHAPE TO A TEMPERATURE OF 20002500* C. TO RECRYSTALLIZED THE SILICON CARBIDE AND INTRODUCE THE BORON INTO THE SILICON CARBIDE CRYSTAL STRUCTURE.
References Cited (Backward Citations)
US1019568A
Cited
US864723A
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US1349053A
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US1742259A
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US1841537A
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US2445296A
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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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |