Patent US2781850A successfully refreshed from Google Patents.
US2781850A
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Method and composition for selective plugging of oil wells
Assignee: Union Oil Company of California
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Filing: 1954-06-21
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Granted: 1957-02-19
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Nowak
- 👤 Paul W Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/502
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
THE METHOD OF SELECTIVELY PLUGGIN OIL- AND WATERPRODUCING FORMATIONS PENETRATED BY A WELL BORE TO DECREASE THE PRODUCTION OF WATER THEREFROM WHICH COMPRISES INJECTING INTO SAID FORMATIONS A COMPOSITION AS DEFINED IN CLAIM 1, ALLOWING SAID COMPOSITION TO REMAIN IN SAID FORMATIONS UNTIL SAID COMPOSITION HAS POLYMERIZED TO AT LEAST A SEMI-SOLID STAGE, AND THEREAFTER PLACING THE WELL IN PRODUCTION.
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) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |