US3754076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicon carbide from rice hulls
Assignee: University of Utah
•
Filing: 1970-10-30
•
Granted: 1973-08-21
•
Expires: 1990-10-30
Abstract
Abstract THIS INVEENTION DISCLOSES THE PRODUCTION OF SILICON CARBIDE FROM THE SILICA AND CARBON PRESENT IN RICE HULLS.
Inventors
- 👤 I Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:21
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01B32/97
Claims Analysis
Total Claims: 0
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |