US3367418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water flooding method
Assignee: Dow Chemical Co
•
Filing: 1965-04-22
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Granted: 1968-02-06
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Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Willis G Routson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; C; C09; C09K; C09K8/00; C09K8/58; C09K8/588
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2831841A
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US2827964A
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US2892823A
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US3039529A
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US3074481A
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US3087539A
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US3208518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |