US3401748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery method using an aqueous detergent composition
Assignee: Phillips Petroleum Co
•
Filing: 1966-10-26
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Granted: 1968-09-17
•
Expires: 1986-10-26
Abstract
No abstract record available.
Inventors
- 👤 Charles A Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:39
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN A METHOD FOR RECOVERING OIL FROM A FORMATION BY INJECTING AN AQUEOUS FLUID WHICH CONSISTS ESSENTIALLY OF AN AQUEOUS LIQUID INTO THAT FORMATION, THE IMPROVEMENT COMPRISING INCORPORATING INTO SAID AQUEOUS FLUID A MIXTURE OF ETHYLENE OXIDE ADDUCTS OF ALKYL PHENOLS HAVING THE FORMULA
Claim 2
Dependent Claim
44 words
IN A METHOD FOR RECOVERING OIL FROM A FORMATION BY INJECTING AN AQUEOUS FLUID WHICH CONSISTS ESSENTIALLY OF AN AQUEOUS LIQUID INTO THAT FORMATION, THE IMPROVEMENT COMPRISING INCORPORATING INTO SAID AQUEOUS FLUID A MIXTURE OF ETHYLENE OXIDE ADDUCTS OF ALKYL PHENOLS HAVING THE FORMULA
References Cited (Backward Citations)
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US2978409A
Cited
US3096820A
Cited
US3082822A
Cited
US3212575A
Cited
US3330346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |