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US2709753A
Expired / Lapsed
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Temperature compensated bore hole radioactivity apparatus
Assignee: Schlumberger Well Surveying Corp
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Filing: 1951-01-02
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Granted: 1955-05-31
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Krasnow Shelley
- 👤 Test Meyer Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:39
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN AN APPARATUS FOR THE MEASUREMENT OF RADIOACTIVITY WITHIN A BORE HOLE, A CARTRIDGE ADAPTED TO BE LOWERED WITHIN THE BORE HOLE, AND TO CONTAIN ELEMENTS RESPONSIVE TO RADIOACTIVITY THEREIN, SAID CARTRIDGE HAVING WITHIN IT A RADIOACTIVE SENSITIVE ELEMENT TO BE SUPPLIED WITH A VOLTAGE WHOSE VALUE DEPENDS UPON THE TEMPERATURE, MEANS TO REVEIVE A VOLTAGE FROM THE SURFACE OF THE EARTH AND TO APPLY A PROPER OPERATING VOLTAGE FOR THE SAID RADIOACTIVE SENSITIVE CLEMENT, THE AFORESAID MEANS HAVING COMBINED THEREWITH A TEMPERATURE COMPENSATED ELEMENT ADAPTED TO VARY THE VOLTAGE SUPPLIED TO THE SAID RADIOACTIVE ELEMENT IN PROPORTION TO THE TEMPERATURE IN SAID BERE HOLE.
Claim 2
Dependent Claim
105 words
IN AN APPARATUS FOR THE MEASUREMENT OF RADIOACTIVITY WITHIN A BORE HOLE, A CARTRIDGE ADAPTED TO BE LOWERED WITHIN THE BORE HOLE, AND TO CONTAIN ELEMENTS RESPONSIVE TO RADIOACTIVITY THEREIN, SAID CARTRIDGE HAVING WITHIN IT A RADIOACTIVE SENSITIVE ELEMENT TO BE SUPPLIED WITH A VOLTAGE WHOSE VALUE DEPENDS UPON THE TEMPERATURE, MEANS TO REVEIVE A VOLTAGE FROM THE SURFACE OF THE EARTH AND TO APPLY A PROPER OPERATING VOLTAGE FOR THE SAID RADIOACTIVE SENSITIVE CLEMENT, THE AFORESAID MEANS HAVING COMBINED THEREWITH A TEMPERATURE COMPENSATED ELEMENT ADAPTED TO VARY THE VOLTAGE SUPPLIED TO THE SAID RADIOACTIVE ELEMENT IN PROPORTION TO THE TEMPERATURE IN SAID BERE HOLE.
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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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |