US3719606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microemulsion of increased viscosity for improved oil recovery
Assignee: Pan American Petroleum Corp
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Filing: 1969-08-08
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Granted: 1973-03-06
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Expires: 1989-08-08
Abstract
Abstract IN THE USE OF MICROEMULSIONS AS SOLVENTS IN MISCIBLE WATERFLOODING, THE DISPLACEMENT EFFICIENCY OF SUCH SOLVENTS IS INPROVED BY INCREASING THEIR VISCOSITY WITH A COMPATIBLE POLYMER THICKENER SUCH AS POLYSACCHARIDE B-1459 OR POLY(GLUCOSYLGLUCANS). MODIFIED MICROEMULS ONS OF THIS TYPE AND THEIR USE IN MISCIBLE FLOODING ARE DISCRIBED.
Inventors
- 👤 H Froning
- 👤 W Askew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:54
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |