US4011910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer flooding in high permeability reservoirs
Assignee: Marathon Oil Co
•
Filing: 1973-06-13
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Granted: 1977-03-15
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Expires: 1993-06-13
Abstract
No abstract record available.
Inventors
- 👤 John S Rhudy
- 👤 William B Gogarty
- 👤 Bruce L Knight
- 👤 James H Fullinwider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C09K8/58; C09K8/588; E; E21; E21B; E21B43/00; E21B43/25
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |