US2965557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of oil from bituminous sands
Assignee: Cities Service Research and Development Co
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Filing: 1959-06-12
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Granted: 1960-12-20
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Expires: 1979-06-12
Abstract
No abstract record available.
Inventors
- 👤 William H Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:46
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS FOR RECOVERING OIL AND SILT FROM BITUMINOUS SAND CONTAINING THE SAME WHICH COMPRISES MIXING THE BITUMINOUS SAND WITH HYDROCARBON DILUENT, INTRODUCING THE RESULTANT MIXTURE INTO A SEPARATION ZONE TO FORM THERIN A LOWER FLUIDIZED LAYER OF SAND SUBSTANTIALLY FREE OF ADDED WATER AND AN UPPER LIQUID LAYER OF OIL AND SILT, INTRODUCING HYDROCARBON DILUENT INTO SAID LOWER LAYER, AND SEPARATELY REMOVING EACH OF SAID LAYERS FROM SAID SEPARATION ZONE.
Claim 2
Dependent Claim
71 words
THE PROCESS FOR RECOVERING OIL AND SILT FROM BITUMINOUS SAND CONTAINING THE SAME WHICH COMPRISES MIXING THE BITUMINOUS SAND WITH HYDROCARBON DILUENT, INTRODUCING THE RESULTANT MIXTURE INTO A SEPARATION ZONE TO FORM THERIN A LOWER FLUIDIZED LAYER OF SAND SUBSTANTIALLY FREE OF ADDED WATER AND AN UPPER LIQUID LAYER OF OIL AND SILT, INTRODUCING HYDROCARBON DILUENT INTO SAID LOWER LAYER, AND SEPARATELY REMOVING EACH OF SAID LAYERS FROM SAID SEPARATION ZONE.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |