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US3548271A
Expired / Lapsed
US
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Nuclear well logging electronic circuit for the surface control of a motor located in a logging sonde by frequency selective means
Assignee: Texaco Inc
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Filing: 1968-07-29
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Granted: 1970-12-15
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Expires: 1988-07-29
Abstract
No abstract record available.
Inventors
- 👤 John G Kampfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:34
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; G; G01; G01V; G01V5/00; G01V5/04; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |