US2839466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flooding composition
Assignee: ConocoPhillips Co
•
Filing: 1955-03-30
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Granted: 1958-06-17
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 D Arcy A Shock
- 👤 John D Sudbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:40
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A FLOODING PROCESS FOR RECOVERING OIL FROM A SUBTERRANEAN OIL-BEARING FORMATION WHICH CONSISTS IN FLOODING SAID FORMATION WITH AN AQUEOUS COMPOSITION COMPRISING WATER AS THE MAJOR COMPONENT HAVING INCORPORATED THEREIN 25 TO 200 P. P. M. OF AN ALKARYL SULFONIC ACID WHICH HAS A MOLECULAR WEIGHT OF NOT LESS THAN 400 AND 25 TO 200 P. P. M. OF A WATER SOLUBLE CARBOXYLIC ACID CONTAINING FROM 1 TO 7 CARBON ATOMS, CHARACTERIZED FURTHER IN THAT THE ALKALINE EARTH METAL SALT OF SAID CARBOXYLIC ACID IS WATER SOLUBLE.
Claim 2
Dependent Claim
87 words
A FLOODING PROCESS FOR RECOVERING OIL FROM A SUBTERRANEAN OIL-BEARING FORMATION WHICH CONSISTS IN FLOODING SAID FORMATION WITH AN AQUEOUS COMPOSITION COMPRISING WATER AS THE MAJOR COMPONENT HAVING INCORPORATED THEREIN 25 TO 200 P. P. M. OF AN ALKARYL SULFONIC ACID WHICH HAS A MOLECULAR WEIGHT OF NOT LESS THAN 400 AND 25 TO 200 P. P. M. OF A WATER SOLUBLE CARBOXYLIC ACID CONTAINING FROM 1 TO 7 CARBON ATOMS, CHARACTERIZED FURTHER IN THAT THE ALKALINE EARTH METAL SALT OF SAID CARBOXYLIC ACID IS WATER SOLUBLE.
References Cited (Backward Citations)
US2356205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |