US3574096A
Expired / Lapsed
US
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Process and apparatus for the separation of oil from an oil-water mixture
Assignee: BO R CARLSTEDT
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Filing: 1969-03-24
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Granted: 1971-04-06
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Expires: 1989-03-24
Abstract
Abstract SAID MATERIAL, MAINTAINING A GROUND WATER ZERO-PRESSURE LEVEL IN SAID LAYER AND FINALLY COLLECTING A SUBSTANTIALLY PURE OIL PHASE AT A PLACE IN SAID LAYER SITUATED AT A DISTANCE FROM THE REGION WHERE THE MIXTURE HAS BEEN INTRODUCED. A PROCESS AND AN APPARATUS FOR THE SEPARATION OF OIL FROM AN OIL-WATER MIXTURE COMPRISING INTRODUCING AN OILWATER MIXTURE TO A SURFACE REGION OF A LAYER OF GRAINY OIL-RESISTANT MATERIAL HOUSED IN A TANK, FLOWING AN AQUEOUS PHASE SUBSTANTIALLY VERTICALLY DOWN THROUGH THE LAYER OF
Inventors
- 👤 Bo R Carlstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:37
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/04
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |