US2946382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering hydrocarbons from underground formations
Assignee: Phillips Petroleum Co
•
Filing: 1956-09-19
•
Granted: 1960-07-26
•
Expires: 1976-09-19
Abstract
No abstract record available.
Inventors
- 👤 Mehmet R Tek
- 👤 Andrew F Bertuzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:17
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B43/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1457479A
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US1494735A
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US2413765A
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US2642943A
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US2780449A
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US2754911A
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US2818118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |