US3379882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for neutron well logging based on the lifetime of neutrons in the formations
Assignee: Dresser Industries Inc
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Filing: 1967-03-16
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Granted: 1968-04-23
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Expires: 1987-03-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Youmans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101; G01V5/102; G01T; G01T3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
APPARATUS FOR WELL LOGGING COMPRISING A SOURCE OF NEUTRONS; RADIATION DETECTION MEANS SPACED FROM SAID SOURCE OF NEUTRONS AND INCLUDING A PHOSPHOR, A PHOTOMULTIPLIER OPTICALLY CONNECTED TO SAID PHOSPHOR, AND A BORON SHIELD DISPOSED ABOUT SAID PHOSPHOR, MEANS FOR OPERATING SAID SOURCE AND DETECTION MEANS TO PRODUCE A DISCRETE BURST OF NEUTRONS AND TO MEASURE THE RATE OF DECLINE OF RADIATIONS OCCASIONED IN A MEDIUM BY SAID BURST OF NEUTRONS; AND RECORDING MEANS INTERCONNECTED WITH SAID DETECTION MEANS.
References Cited (Backward Citations)
US3102956A
Cited
US3115579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |