US3373349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging methods and apparatus for solving the potential reference problem in electrode type investigating apparatus
Assignee: Schlumberger Technology Corp
•
Filing: 1965-07-14
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Granted: 1968-03-12
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Expires: 1985-07-14
Abstract
No abstract record available.
Inventors
- 👤 Denis R Tanguy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:42
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)
US2349366A
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US2754475A
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US2729783A
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US2712630A
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US2704347A
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US2880389A
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US3103626A
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US3262050A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |