US3480081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure pulsing oil production process
Assignee: ConocoPhillips Co
•
Filing: 1967-02-20
•
Granted: 1969-11-25
•
Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Martin Felsenthal
- 👤 Howard H Ferrell
- 👤 Robert R Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:10
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1658305A
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US3123134A
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US1067868A
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US1787972A
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US2669306A
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US2609051A
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US2724437A
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US3101782A
Cited
US3065590A
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US3333637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |