Patent US5391146A successfully refreshed from Google Patents.
US2656470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prospecting
Assignee: Texaco Inc
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Filing: 1951-03-19
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Granted: 1953-10-20
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Expires: 1971-03-19
Abstract
No abstract record available.
Inventors
- 👤 Herzog Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:29
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
IN GEOPHYSICAL EXAMINATIONS INVOLVING DETECTION AND MEASUREMENT OF THE INTENSITY OF GAMMA RAYS EMITTED FROM THE EARTH AT DIFFERENT LOCATIONS ALONG A TRAVERSE OF AN EARTH SURFACE, THE IMPROVEMENT WHICH COMPRISES DETECTING THE GAMMA RADIATION WITH A BUNDLE OF PULSE-TYPE DE-
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) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |