US2749446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prospecting
Assignee: Texaco Inc
•
Filing: 1951-07-23
•
Granted: 1956-06-05
•
Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Herzog Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN APPARATUS FOR INVESTIGATING GAMMA SPECTRA OF FORMATIONS PENETRATED BY A WELL BORE, THE COMBINATION WHICH COMPRISES A LOGGING HEAD ADAPTED TO BE DRAWN ALONG A WELL BORE, A PHOTOMULTIPHER TUBE PROVIDED WITH A CATHODE MOUNTED IN THE LOGGING HEAD, A BODY WHICH UPON BOMBARDMENT WITH GAMMA RAYS PRODUCES ELECTRONS WHICH MOVE THROUGH THE BODY AND CAUSE IT TO EMIT PHOTONS, SAID BODY BEING TRANSLUCENT TO ITS OWN LUMINESCENT PHOTONS AND SO LARGE THAT THE ELECTRONS DISSIPATE SUBSTANTIALLY ALL OF THEIR ENERGY THEREIN AND BEING DISPOSED IN
Claim 2
Dependent Claim
87 words
IN APPARATUS FOR INVESTIGATING GAMMA SPECTRA OF FORMATIONS PENETRATED BY A WELL BORE, THE COMBINATION WHICH COMPRISES A LOGGING HEAD ADAPTED TO BE DRAWN ALONG A WELL BORE, A PHOTOMULTIPHER TUBE PROVIDED WITH A CATHODE MOUNTED IN THE LOGGING HEAD, A BODY WHICH UPON BOMBARDMENT WITH GAMMA RAYS PRODUCES ELECTRONS WHICH MOVE THROUGH THE BODY AND CAUSE IT TO EMIT PHOTONS, SAID BODY BEING TRANSLUCENT TO ITS OWN LUMINESCENT PHOTONS AND SO LARGE THAT THE ELECTRONS DISSIPATE SUBSTANTIALLY ALL OF THEIR ENERGY THEREIN AND BEING DISPOSED IN
References Cited (Backward Citations)
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US2378408A
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US2508772A
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US2493346A
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US2534932A
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US2648012A
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US2590057A
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US2659011A
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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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |