US3538329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal correction system for well logging instrument having short and long-spaced radioactivity detectors and a bore hole caliper
Assignee: Western Atlas International Inc
•
Filing: 1967-11-21
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Granted: 1970-11-03
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Expires: 1987-11-21
Abstract
No abstract record available.
Inventors
- 👤 Francis J Niven Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:07
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/12; G01V5/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3321625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |