Patent US2631270A successfully refreshed from Google Patents.
US2631270A
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Method of and apparatus for the measurement of distance or time interval by the use of compressional waves in the so-called supersonic range
Assignee: Eastman Oil Well Survey Co
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Filing: 1947-05-19
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Granted: 1953-03-10
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Expires: 1967-05-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Goble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/09; E21B47/08; E21B47/085; G; G01; G01B; G01B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2190686A
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US2156052A
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US2333688A
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US2251817A
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GB546202A
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US2368532A
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US2415636A
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US2460316A
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US2456598A
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US2398562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |