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US2872637A
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Electrical resistivity well logging methods and apparatus
Assignee: Schlumberger Well Surveying Corp
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Filing: 1953-07-29
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Granted: 1959-02-03
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Expires: 1973-07-29
Abstract
No abstract record available.
Inventors
- 👤 Blanchard Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:04
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1819923A
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US2347794A
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US2446303A
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US2619520A
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US2592125A
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GB691721A
Cited
US2752561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |