Patent US2862795A successfully refreshed from Google Patents.
US2862795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of synthesizing silicon carbide
Assignee: Saint Gobain Abrasives Inc
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Filing: 1953-12-04
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Granted: 1958-12-02
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:28
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01B32/97
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
PROCESS OF SYNTHESIZING SILICON CARBIDE WHICH COMPRISES HEATING IN A CONTAINER A MIXTURE OF SILICA AND COKE BOTH IN SOLID PHASE TO A REACTION TEMPERATURE WHICH IS BELOW THE MELTING POINT OF SILICA FOR AT LEAST ONE HOUR, AND NEVER RISES TO THE MELTING POINT OF SILICA, THEREBY CAUSING SOME CARBON OF THE COKE TO REMOVE THE OXYGEN OF THE SILICA AND THEREBY CAUSING THE RESULTING SILICON TO COMBINE WITH MORE CARBON OF THE COKE TO FORM SILICON CARBIDE OF CUBIC CRYSTALLINITY IN A SOLID PHASE REACTION.
Claim 2
Dependent Claim
87 words
PROCESS OF SYNTHESIZING SILICON CARBIDE WHICH COMPRISES HEATING IN A CONTAINER A MIXTURE OF SILICA AND COKE BOTH IN SOLID PHASE TO A REACTION TEMPERATURE WHICH IS BELOW THE MELTING POINT OF SILICA FOR AT LEAST ONE HOUR, AND NEVER RISES TO THE MELTING POINT OF SILICA, THEREBY CAUSING SOME CARBON OF THE COKE TO REMOVE THE OXYGEN OF THE SILICA AND THEREBY CAUSING THE RESULTING SILICON TO COMBINE WITH MORE CARBON OF THE COKE TO FORM SILICON CARBIDE OF CUBIC CRYSTALLINITY IN A SOLID PHASE REACTION.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |