Patent US3236303A successfully refreshed from Google Patents.
US3236303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-flooding method using an alcohol-surfactant mixture
Assignee: Union Oil Company of California
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Filing: 1961-11-09
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Granted: 1966-02-22
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Expires: 1981-11-09
Abstract
No abstract record available.
Inventors
- 👤 Albert K Csaszar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:44
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF RECOVERING PETROLEUM FROM SUBTERRANEAN RESERVOIRS PENETRATED BY AN INJECTION WELL AND A PRODUCING WELL COMPRISING INJECTING THROUGH SAID INJECTION WELL AND INTO SAID RESERVOIR ABOUT 0.03 TO 0.10 RESERVOIR PORE VOLUME OF A MIXTURE CONSISTING ESSENTIALLY OF A PARTIALLY OXYGENATED HYDROCARBON SOLVENT WHICH IS MUTUALLY SOLUBLE IN OIL AND WATER, AND ABOUT 0.01 TO 2.0% BY VOLUME OF A SURFACTANT, SAID SURFACTANT BEING CHEMICALLY NONREACTIVE WITH SAID PARTIALLY OXYGENATED HYDROCARBON SOLVENT DRIVING SAID MIXTURE TOWARDS SAID PRODUCING WELL BY THE INJECTION OF FLOODWATER, AND RECOVERING PETROLEUM FROM SAID PRODUCING WELL.
Claim 2
Independent Claim
93 words
A METHOD OF RECOVERING PETROLEUM FROM SUBTERRANEAN RESERVOIRS PENETRATED BY AN INJECTION WELL AND A PRODUCING WELL COMPRISING INJECTING THROUGH SAID INJECTION WELL AND INTO SAID RESERVOIR ABOUT 0.03 TO 0.10 RESERVOIR PORE VOLUME OF A MIXTURE CONSISTING ESSENTIALLY OF A PARTIALLY OXYGENATED HYDROCARBON SOLVENT WHICH IS MUTUALLY SOLUBLE IN OIL AND WATER, AND ABOUT 0.01 TO 2.0% BY VOLUME OF A SURFACTANT, SAID SURFACTANT BEING CHEMICALLY NONREACTIVE WITH SAID PARTIALLY OXYGENATED HYDROCARBON SOLVENT DRIVING SAID MIXTURE TOWARDS SAID PRODUCING WELL BY THE INJECTION OF FLOODWATER, AND RECOVERING PETROLEUM FROM SAID PRODUCING WELL.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |