US3437141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistep method of waterflooding
Assignee: Mobil Oil AS
•
Filing: 1967-10-09
•
Granted: 1969-04-08
•
Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Carl F Brandner
- 👤 Peggy M Dunlap
- 👤 William R Foster
- 👤 Billy G Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2731414A
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US3025911A
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US3208518A
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US3258071A
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US3191676A
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US3288213A
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US3302713A
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US3348611A
Cited
US3369602A
Cited
US3361313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |