US2871444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical well logging
Assignee: Phillips Petroleum Co
•
Filing: 1953-07-20
•
Granted: 1959-01-27
•
Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Piety
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2398761A
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US2436563A
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US2379996A
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US2568241A
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US2501953A
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US2653294A
Cited
US2667626A
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US2654064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |