Patent US2857522A successfully refreshed from Google Patents.
US2857522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive bore hole logging
Assignee: California Research LLC
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Filing: 1951-06-16
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Granted: 1958-10-21
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Expires: 1971-06-16
Abstract
No abstract record available.
Inventors
- 👤 Stanley B Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/06; G01T; G01T1/00; G01T1/16; G01T1/20; G01V5/08; G01V5/10; G01V5/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
WELL LOGGING APPARATUS FOR DETECTING BETA RAY ACTIVITY COMPRISING AN ELONGATED HOUSING ADAPTED TO BE POMOUNTED EXTERNALLY ON A WALL OF SAID HOUSING FOR EXPOSURE TO THE WELL BORE, A BETA-RAY PREVIOUS COATING SURROUNDING THE SURFACE OF SAID PHOSPHOR WHICH IS EXPOSED TO SAID WELL BORE, WINDOW MEANS FOR SAID WALL OF SAID HOUSING WELL BORE, WINDOW MEANS FOR SAID WALL OF SAID HOUSING THE INTERIOR OF SAID HOUSING, AND PHOTOELECTRIC MULTIPLIER MEANS MOUNTED WITHIN SAID HOUSING AND OPTICALLY COUPLED TO SAID WINDOW MEANS WHEREBY BETA RAY ACTIVITY CAUSING LIGHT QUANTA TO BE ENMITTED BY SAID PHOSPHOR MAY BE DETECTED, AND MEANS FOR CORRELATING SAID BETA RAY ACTIVITY WITH THE DEPTH OF SAID HOUSING IN A WELL BORE.
Claim 2
Dependent Claim
118 words
WELL LOGGING APPARATUS FOR DETECTING BETA RAY ACTIVITY COMPRISING AN ELONGATED HOUSING ADAPTED TO BE POMOUNTED EXTERNALLY ON A WALL OF SAID HOUSING FOR EXPOSURE TO THE WELL BORE, A BETA-RAY PREVIOUS COATING SURROUNDING THE SURFACE OF SAID PHOSPHOR WHICH IS EXPOSED TO SAID WELL BORE, WINDOW MEANS FOR SAID WALL OF SAID HOUSING WELL BORE, WINDOW MEANS FOR SAID WALL OF SAID HOUSING THE INTERIOR OF SAID HOUSING, AND PHOTOELECTRIC MULTIPLIER MEANS MOUNTED WITHIN SAID HOUSING AND OPTICALLY COUPLED TO SAID WINDOW MEANS WHEREBY BETA RAY ACTIVITY CAUSING LIGHT QUANTA TO BE ENMITTED BY SAID PHOSPHOR MAY BE DETECTED, AND MEANS FOR CORRELATING SAID BETA RAY ACTIVITY WITH THE DEPTH OF SAID HOUSING IN A WELL BORE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |