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Patent US2885339A successfully refreshed from Google Patents.
US2885339A
Expired / Lapsed
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Recovery of oil from oil bearing sands
Assignee: Can Amera Oil Sands Development Ltd
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Filing: 1956-11-23
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Granted: 1959-05-05
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Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Gordon R Coulson
- 👤 Clark Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:22
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE METHOD OF SEPARATING COARSE SAND FROM OILBEARING SANDS WHICH COMPRISES DILUTING THE OIL PHASE THROUGH ADDITION OF A DILUENT OF LESSER SPECIFIC GRAVITY THAN THE OIL, IN AN AMOUNT SUFFICIENT TO REDUCE THE SPECIFIC GRAVITY OF SAID OIL SUBSTANTIALLY BELOW 1.00, FEEDING THE DILUTED OIL-BEARING SANDS INTO THE UPPER PORTION OF A TOWER, INTRODUCING A STREAM OF WATER TO THE BOTTOM OF THE TOWER UNDER SUFFICIENT PRESSURE TP PROVIDE AN UPWARD WATER FLOW OF FROM 0.2 TO 1.5 FEET PER MINUTE, DRAWING OFF THE CLEANSED COARSE SAND FROM THE BOTTOM OF THE TOWER, AND REMOVING FROM THE TOP OF THE TOWER THE OVERFLOW CONSISTING IF OIL, WATER. AND OIL-BEARING CLAY AND OTHER FINES.
Claim 2
Independent Claim
114 words
THE METHOD OF SEPARATING COARSE SAND FROM OILBEARING SANDS WHICH COMPRISES DILUTING THE OIL PHASE THROUGH ADDITION OF A DILUENT OF LESSER SPECIFIC GRAVITY THAN THE OIL, IN AN AMOUNT SUFFICIENT TO REDUCE THE SPECIFIC GRAVITY OF SAID OIL SUBSTANTIALLY BELOW 1.00, FEEDING THE DILUTED OIL-BEARING SANDS INTO THE UPPER PORTION OF A TOWER, INTRODUCING A STREAM OF WATER TO THE BOTTOM OF THE TOWER UNDER SUFFICIENT PRESSURE TP PROVIDE AN UPWARD WATER FLOW OF FROM 0.2 TO 1.5 FEET PER MINUTE, DRAWING OFF THE CLEANSED COARSE SAND FROM THE BOTTOM OF THE TOWER, AND REMOVING FROM THE TOP OF THE TOWER THE OVERFLOW CONSISTING IF OIL, WATER. AND OIL-BEARING CLAY AND OTHER FINES.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |