US2586745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic well logging
Assignee: Standard Oil Development Co
•
Filing: 1947-11-26
•
Granted: 1952-02-19
•
Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Frank N Tullos
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; Y; Y10; Y10S; Y10S367/00; Y10S367/911; Y10S367/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2088324A
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US2200476A
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US2251817A
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US2244484A
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US2451021A
Cited
US2466904A
Cited
US2444349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |