US3521154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for enhancing well logging signals by the use of multiple measurements of the same formation characteristic
Assignee: Schlumberger Technology Corp
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Filing: 1967-07-03
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Granted: 1970-07-21
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Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 James J Maricelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:06
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/24; E; E21; E21B; E21B47/00; E21B47/02; E21B47/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2436503A
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US3060373A
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US3136942A
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US3075142A
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US3180141A
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US3172036A
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US3166708A
Cited
US3405351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |