Patent US2957083A successfully refreshed from Google Patents.
US2957083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactivity well logging system
Assignee: Pgac Dev Co
•
Filing: 1958-06-30
•
Granted: 1960-10-18
•
Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Serge A Scherbatskoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:46
CPC Classifications
G; G01; G01V; G01V11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A RADIOACTIVITY WELL LOGGING SYSTEM COMPRISING A SUBSURFACE UNIT, A SINGLE CONDUCTOR CABLE FOR LOWERING SAID UNIT INTO A BOREHOLE, RADIATION DETECTOR MEANS POSITIONED WITHIN SAID UNIT AND OPERATIVE TO PRODUCE PULSES IN RESPONSE TO RADIATIONS INTERCEPTED THEREBY, MEANS IN SAID UNIT FOR AMPLIFYING SAID PULSES AND FOR COUPLING SAID AMPLIFIED PULSES TO SAID SINGLE CONDUCTOR CABLE, COLLAR FINDER MEANS INDEPENDENT, OF SAID RADIATION DETECTOR MEANS AND POSITIONED WITHIN SAID UNIT, SAID COLLAR FINDER MEANS BEING OPERATIVE TO PRODUCE A SIGNAL PROPORTIONAL TO THE MAGNETIC PROPERTIES OF A METALLIC CASING WITHIN THE BOREHOLE, MEANS FOR COUPLING SAID MAGNETIC SIGNAL TO SAID SINGLE CONDUCTOR CABLE, MEANS AT THE EARTH''S SURFACE FOR SEPARATING SAID PULSES FROM SAID MAGNETIC SIGNAL, MEANS FOR CONVERTING SAID SEPARATED PULSES INTO A VOLTAGE HAVING AN AMPLITUDE PROPORTIONAL TO THE RATE OF OCCURRENCE OF SAID
Claim 2
Dependent Claim
137 words
A RADIOACTIVITY WELL LOGGING SYSTEM COMPRISING A SUBSURFACE UNIT, A SINGLE CONDUCTOR CABLE FOR LOWERING SAID UNIT INTO A BOREHOLE, RADIATION DETECTOR MEANS POSITIONED WITHIN SAID UNIT AND OPERATIVE TO PRODUCE PULSES IN RESPONSE TO RADIATIONS INTERCEPTED THEREBY, MEANS IN SAID UNIT FOR AMPLIFYING SAID PULSES AND FOR COUPLING SAID AMPLIFIED PULSES TO SAID SINGLE CONDUCTOR CABLE, COLLAR FINDER MEANS INDEPENDENT, OF SAID RADIATION DETECTOR MEANS AND POSITIONED WITHIN SAID UNIT, SAID COLLAR FINDER MEANS BEING OPERATIVE TO PRODUCE A SIGNAL PROPORTIONAL TO THE MAGNETIC PROPERTIES OF A METALLIC CASING WITHIN THE BOREHOLE, MEANS FOR COUPLING SAID MAGNETIC SIGNAL TO SAID SINGLE CONDUCTOR CABLE, MEANS AT THE EARTH''S SURFACE FOR SEPARATING SAID PULSES FROM SAID MAGNETIC SIGNAL, MEANS FOR CONVERTING SAID SEPARATED PULSES INTO A VOLTAGE HAVING AN AMPLITUDE PROPORTIONAL TO THE RATE OF OCCURRENCE OF SAID
References Cited (Backward Citations)
US2309835A
Cited
US2740053A
Cited
US2617042A
Cited
US2802951A
Cited
US2856536A
Cited
US2838680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |