US2760078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduction counter for radioactivity well logging
Assignee: Well Surveys Inc
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Filing: 1952-05-27
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Granted: 1956-08-21
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Expires: 1972-05-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Youmans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
G; G01; G01T; G01T3/00; G01T3/08; G01T1/00; G01T1/16; G01T1/26; G01V; G01V5/00; G01V5/04; G01V5/06; G01V5/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
AN APPARATUS FOR MAKING A RADIOACTIVITY LOG OF A WELL THAT COMPRISES IN COMBINATION A SUBSURFACE INSTRUMENT HOUSING ADAPTED TO TRAVERSE A DEEP NARROW WELL; MEANS FOR TRAVERSING THE WELL WITH SAID INSTRUMENT HOUSING; A NORMALLY ELECTRICALLY INSULATING MATERIAL CONFINED IN A CONDENSED STATE WITHIN SAID INSTRUMENT HOUSING, SAID INSULATING MATERIAL BEING ADAPTED TO CONDUCT ELECTRICITY WHEN BOMBARDED BY ALPHA PARTICLES; NEUTRON REACTIVE MATERIAL SO DISPOSED RELATIVE TO SAID INSULATING MATERIAL THAT ALPHA PARTICLES THEREFROM MAY REACH SAID INSULATING MATERIAL, SAID NEUTRON REACTIVE MATERIAL BEING SELECTED FROM THE GROUP CONTAINIG BORON AND LITHIUM; AT LEAST TWO ELECTRODES DISPOSED IN SAID HOUSING WITH SAID INSULATING MATERIAL THEREBETWEEN AND SPACED SUCH THAT THERE IS A THICKNESS OF INSULATING MATERIAL BETWEEN SAID ELECTRODES WHICH IS ENOUGH TO STOP SAID ALPHA PARTICLES BUT
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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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |