US2920266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical well logging
Assignee: Phillips Petroleum Co
•
Filing: 1956-08-08
•
Granted: 1960-01-05
•
Expires: 1976-08-08
Abstract
No abstract record available.
Inventors
- 👤 Joe D Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:07
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2370162A
Cited
US2573133A
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US2754475A
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US2573137A
Cited
US2654064A
Cited
US2782364A
Cited
US2790137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |