US3308883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickened water for secondary recovery process
Assignee: Mobil Oil AS
•
Filing: 1964-11-05
•
Granted: 1967-03-14
•
Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 William R Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:42
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/06; C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C09; C09K; C09K8/00; C09K8/58; C09K8/588; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A METHOD FOR THE RECOVERY OF OIL FROM AN OILCONTAINING SUBTERRANEAN FORMATION WHEREIN A FLUID IS INJECTED INTO AN INJECTION WELL PENETRATING SAID FORMATION, THE IMPROVEMENT COMPRISING INJECTING THROUGH SAID INJECTION WELL AND INTO SAID FORMATION A THICKENED AQUEOUS SOLUTION COMPRISING WATER HAVING INCORPORATED THEREIN FROM 0.01 TO 1.0 PERCENT BY WEIGHT OF A WATER-SOLUBLE COMPOUND SELECTED FROM THE CLASS CONSISTING OF SULFONATED POLY-(DIALKYL PHENOL) AND ITS SALTS WHEREIN THE ALKYL GROUPS ARE IN THE TWO AND SIX POSITIONS ON THE PHENOL NUCLEUS AND ARE SELECTED FROM THE CLASS CONSISTING OF METHYL, ETHYL, AND NORMAL PROPYL.
Claim 2
Dependent Claim
97 words
IN A METHOD FOR THE RECOVERY OF OIL FROM AN OILCONTAINING SUBTERRANEAN FORMATION WHEREIN A FLUID IS INJECTED INTO AN INJECTION WELL PENETRATING SAID FORMATION, THE IMPROVEMENT COMPRISING INJECTING THROUGH SAID INJECTION WELL AND INTO SAID FORMATION A THICKENED AQUEOUS SOLUTION COMPRISING WATER HAVING INCORPORATED THEREIN FROM 0.01 TO 1.0 PERCENT BY WEIGHT OF A WATER-SOLUBLE COMPOUND SELECTED FROM THE CLASS CONSISTING OF SULFONATED POLY-(DIALKYL PHENOL) AND ITS SALTS WHEREIN THE ALKYL GROUPS ARE IN THE TWO AND SIX POSITIONS ON THE PHENOL NUCLEUS AND ARE SELECTED FROM THE CLASS CONSISTING OF METHYL, ETHYL, AND NORMAL PROPYL.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |