US3516787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of oil and aluminum from oil shale
Assignee: Sinclair Research Inc
•
Filing: 1966-08-10
•
Granted: 1970-06-23
•
Expires: 1986-08-10
Abstract
No abstract record available.
Inventors
- 👤 Robert A Van Nordstrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1891609A
Cited
US2141132A
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US2468654A
Cited
US2592468A
Cited
US2904445A
Cited
US2947606A
Cited
US2973244A
Cited
US3135618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |