US3397356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of investigating subsurface earth formations by combining the electrical resistivities at different lateral depths within the formations
Assignee: Schlumberger Technology Corp
•
Filing: 1966-05-27
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Granted: 1968-08-13
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Jean L Dumanoir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; Y; Y02; Y02A; Y02A90/00; Y02A90/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124742A
Cited
US3002148A
Cited
US3086168A
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US3075142A
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US3180141A
Cited
US3166708A
Cited
US3329889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |