Patent US3068167A successfully refreshed from Google Patents.
US3068167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen separation of tar sand
Assignee: Cities Service Research and Development Co
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Filing: 1959-11-16
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Granted: 1962-12-11
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Expires: 1979-11-16
Abstract
No abstract record available.
Inventors
- 👤 Edmund W White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:08
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE PROCESS FOR THE RECOVERY OF HYDROCARBON OIL FROM BITUMINOUS SAND CONTAINING THE SAME WHICH COMPRISES FORMING A SLURRY OF SAID BITUMINOUS SAND AND LIQUID HYDROCARBON DILUENT, PASSING SAID SLURRY OVER A FIRST SEPARATING SCREEN TO THEREBY SEPARATE A FIRST PORTION OF SOLIDS TOO LARGE TO PASS THROUGH THE OPENINGS OF SAID SCREEN FROM THE REMAINING SOLIDS AND HYDROCARBON LIAUID, PASSING SAID REMAINING SOLIDS AND HYDROCARBON LIQUID OVER A SECOND SEPARATING SCREEN HAVING SMALLER OPENINGS THAN SAID FIRST SCREEN TO THEREBY SEPARATE A SECOND PORTION OF SOLIDS TOO LARGE TO PASS THROUGH THE OPENINGS OF SAID SECOND SCREEN, SEPARATELY SLURRYING SAID PORTIONS OF SOLIDS WITH WATER TO REMOVE ENTRAINED HYDROCARBON LIQUID THEREFROM, AND TREATING SAID SLURRIES OF SOLIDS, HYDROCARBON LIQUID AND WATER FOR RECOVERY OF HYDROCARBON LIQUID THEREFROM.
Claim 2
Dependent Claim
128 words
THE PROCESS FOR THE RECOVERY OF HYDROCARBON OIL FROM BITUMINOUS SAND CONTAINING THE SAME WHICH COMPRISES FORMING A SLURRY OF SAID BITUMINOUS SAND AND LIQUID HYDROCARBON DILUENT, PASSING SAID SLURRY OVER A FIRST SEPARATING SCREEN TO THEREBY SEPARATE A FIRST PORTION OF SOLIDS TOO LARGE TO PASS THROUGH THE OPENINGS OF SAID SCREEN FROM THE REMAINING SOLIDS AND HYDROCARBON LIAUID, PASSING SAID REMAINING SOLIDS AND HYDROCARBON LIQUID OVER A SECOND SEPARATING SCREEN HAVING SMALLER OPENINGS THAN SAID FIRST SCREEN TO THEREBY SEPARATE A SECOND PORTION OF SOLIDS TOO LARGE TO PASS THROUGH THE OPENINGS OF SAID SECOND SCREEN, SEPARATELY SLURRYING SAID PORTIONS OF SOLIDS WITH WATER TO REMOVE ENTRAINED HYDROCARBON LIQUID THEREFROM, AND TREATING SAID SLURRIES OF SOLIDS, HYDROCARBON LIQUID AND WATER FOR RECOVERY OF HYDROCARBON LIQUID THEREFROM.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |