US3775296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating tar sands
Assignee: HRI Inc
•
Filing: 1972-03-20
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Granted: 1973-11-27
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Expires: 1992-03-20
Abstract
Abstract THE DEGREE OF HYDROGENATION OF BITUMEN DERIVED FROM TAR SANDS OBTAINED IN AN UPFLOW LIQUID PHASE REACTOR IN WHICH A HYDROCRACKING REACTION IS BEING CARRIED OUT FOR THE PRODUCTION OF AN UPGRADED SYNTHETIC PETROLEUM STOCK IS A FUNCTION OF THE AMOUNT OF NATURALLY OCCURRING SOLIDS COMPONENT IN THE TAR SANDS. IN SOME CASES A SUPPLEMENTAL CATALYST IS REQUIRED TO ASSURE ADEQUATE HYDROGENATION AND AVOIDANCE OF COKE IN THE REACTOR.
Inventors
- 👤 M Chervenak
- 👤 R Wolk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/083
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |