Patent US2926259A successfully refreshed from Google Patents.
US2926259A
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Method and apparatus for analyzing earth formations
Assignee: Schlumberger Well Surveying Corp
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Filing: 1953-09-23
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Granted: 1960-02-23
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Expires: 1973-09-23
Abstract
No abstract record available.
Inventors
- 👤 John T Dewan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:22
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2437935A
Cited
US2567057A
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US2658284A
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US2648012A
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US2652496A
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US2689918A
Cited
US2744199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |