US3472318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon production by secondary recovery
Assignee: Texaco Inc
•
Filing: 1967-06-29
•
Granted: 1969-10-14
•
Expires: 1987-06-29
Abstract
No abstract record available.
Inventors
- 👤 Charles D Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:27
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B43/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798556A
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US2841375A
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US3143169A
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US3153448A
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US3150715A
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US3113617A
Cited
US3256934A
Cited
US3253652A
Cited
US3270809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |