US2913313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing green silicon carbide
Assignee: Elektroschmelzwerk Kempten GmbH
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Filing: 1956-07-10
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Granted: 1959-11-17
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Expires: 1976-07-10
Abstract
No abstract record available.
Inventors
- 👤 Schroll Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:51
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
60 words
PROCESS FOR PRODUCING GREEN SILICON CARBIDE FROM A MIXTURE OF ORDINARY COMMERCIALLY AVAILABLE SAND AND COKE WHICH COMPRISES REACTING SAID MIXTURE IN THE PROPORTIONS OF ABOUT 1000 KG. SAND AND 660 KG. COKE AT A TEMPERATURE OF 1700-2300*C FOR A PERIOD OF ABOUT 8 HOURS, AND SUBJECTING SAID REACTION MIXTURE TO THE ACTION OF CHLORINE THROUGHOUT THE PERIOD OF CONVERSION.
Claim 2
Dependent Claim
60 words
PROCESS FOR PRODUCING GREEN SILICON CARBIDE FROM A MIXTURE OF ORDINARY COMMERCIALLY AVAILABLE SAND AND COKE WHICH COMPRISES REACTING SAID MIXTURE IN THE PROPORTIONS OF ABOUT 1000 KG. SAND AND 660 KG. COKE AT A TEMPERATURE OF 1700-2300*C FOR A PERIOD OF ABOUT 8 HOURS, AND SUBJECTING SAID REACTION MIXTURE TO THE ACTION OF CHLORINE THROUGHOUT THE PERIOD OF CONVERSION.
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |