US2530971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic well logging apparatus
Assignee: Standard Oil Development Co
•
Filing: 1947-07-26
•
Granted: 1950-11-21
•
Expires: 1967-07-26
Abstract
No abstract record available.
Inventors
- 👤 Clare H Kean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:50
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1399877A
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US2076330A
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US2200476A
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US2207281A
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US2244484A
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US2265768A
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US2452085A
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US2437282A
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US2451797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |