Patent US3372749A successfully refreshed from Google Patents.
US3372749A
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US
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Waterflood process employing thickened water
Assignee: Mobil Oil AS
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Filing: 1966-04-18
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Granted: 1968-03-12
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Expires: 1986-04-18
Abstract
No abstract record available.
Inventors
- 👤 Sherrod A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:58
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; B; B01; B01J; B01J19/00; B01J19/06; C09K8/02; C09K8/04; C09K8/06; C09K8/08; Y; Y10; Y10S; Y10S507/00; Y10S507/92; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METHOD OF RECOVERING OIL FROM AN OIL-CONTAINING SUBTERRANEAN FORMATION PENETRATED BY AN INJECTION MEANS AND A PRODUCTION MEANS WHICH COMPRISES INJECTING THROUGH SAID INJECTION MEANS AND INTO SAID FORMATION FLOODING WATER CONTAINING A POLY(GLUCOXYLGLUCAN), THE GLUCOSYLGLUCAN HAVING THE FOLLOWING STRUCTURAL FORMULA: -(2-((2-(HO-CH2-),3,4,5-TRI(HO-)TETRAHYDROPYRAN-6-YL)-OCH2-),3,5-DI(HO -)TETRAHYDROPYRAN-4,6-YLENE)-(O-(2-(HOCH2-),3,5-DI(HO-)TETRAHYDROPYRAN-4,6 -YLENE))2-
Claim 2
Independent Claim
45 words
A METHOD OF RECOVERING OIL FROM AN OIL-CONTAINING SUBTERRANEAN FORMATION PENETRATED BY AN INJECTION MEANS AND A PRODUCTION MEANS WHICH COMPRISES INJECTING THROUGH SAID INJECTION MEANS AND INTO SAID FORMATION FLOODING WATER CONTAINING A POLY(GLUCOXYLGLUCAN), THE GLUCOSYLGLUCAN HAVING THE FOLLOWING STRUCTURAL FORMULA: -(2-((2-(HO-CH2-),3,4,5-TRI(HO-)TETRAHYDROPYRAN-6-YL)-OCH2-),3,5-DI(HO -)TETRAHYDROPYRAN-4,6-YLENE)-(O-(2-(HOCH2-),3,5-DI(HO-)TETRAHYDROPYRAN-4,6 -YLENE))2-
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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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |