US3439743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miscible flooding process
Assignee: Gulf Research and Development Co
•
Filing: 1967-07-13
•
Granted: 1969-04-22
•
Expires: 1987-07-13
Abstract
No abstract record available.
Inventors
- 👤 Malcolm R J Wyllie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; E; E21; E21B; E21B43/00; E21B43/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2584606A
Cited
US2796132A
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US2839141A
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US2897894A
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US3042114A
Cited
US3093191A
Cited
US3167121A
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US3360044A
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US3285336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |