US2775710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of radiological surveying
Assignee: Texaco Development Corp
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Filing: 1952-02-21
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Granted: 1956-12-25
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Expires: 1972-02-21
Abstract
No abstract record available.
Inventors
- 👤 Clifford G Ludeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:25
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/02; G01T; G01T1/00; G01T1/02; G01T1/10; G01T1/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN GEOPHYSICAL EXPLORATION BY RADIOACTIVITY DETECTION, THE IMPROVEMENT WHICH COMPRISES DISPOSING AT LEAST ONE THERMOLUMINESCENT BODY ADJACENT A PORTION OF EARTH TO BE INVESTIGATED, EXPOSING SAID BODY TO RADIATION EMITTED FROM SAID PORTION FOR A PREDETERMINED LENGTH OF TIME WHEREBY SAID PORTION CAUSES LATENT LUMINESCENE TO BE FORMED IN SAID THERMOLUMINESCENT BODY, THEREAFTER SUBJECTING SAID THERMOLUMINESCENT BODY TO RADIATION HAVING WAVE LENGTHS OF APPROXIMATELY 0.00008 TO 0.04 CM. THEREBY RELEASING SAID LATENT LUMINESCENCE FROM SAID THERMOLUMINESCENT BODY AS A RESULT OF SAID LAST-MENTIONED RADIATION, AND QUANTITATIVELY MEASURING SAID LATENT LUMINESCENCE SO RELEASED.
Claim 2
Dependent Claim
92 words
IN GEOPHYSICAL EXPLORATION BY RADIOACTIVITY DETECTION, THE IMPROVEMENT WHICH COMPRISES DISPOSING AT LEAST ONE THERMOLUMINESCENT BODY ADJACENT A PORTION OF EARTH TO BE INVESTIGATED, EXPOSING SAID BODY TO RADIATION EMITTED FROM SAID PORTION FOR A PREDETERMINED LENGTH OF TIME WHEREBY SAID PORTION CAUSES LATENT LUMINESCENE TO BE FORMED IN SAID THERMOLUMINESCENT BODY, THEREAFTER SUBJECTING SAID THERMOLUMINESCENT BODY TO RADIATION HAVING WAVE LENGTHS OF APPROXIMATELY 0.00008 TO 0.04 CM. THEREBY RELEASING SAID LATENT LUMINESCENCE FROM SAID THERMOLUMINESCENT BODY AS A RESULT OF SAID LAST-MENTIONED RADIATION, AND QUANTITATIVELY MEASURING SAID LATENT LUMINESCENCE SO RELEASED.
References Cited (Backward Citations)
US2074226A
Cited
US2227438A
Cited
US2269889A
Cited
US2482813A
Cited
US2506749A
Cited
US2573245A
Cited
US2562969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |