Patent US3304424A successfully refreshed from Google Patents.
US3304424A
Expired / Lapsed
US
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Radioactive well logging technique for logging for the sodium-24 isomer
Assignee: Mobil Oil AS
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Filing: 1963-03-21
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Granted: 1967-02-14
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:23
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101; G01V5/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF LOGGING THE FORMATIONS TRAVERSED BY A BOREHOLE FOR SALT WATER CONTAINING SODIUM WHICH FORMS THE RADIOACTIVE ISOTOPE SODIUM-24 UPON THE CAPTURE OF THERMAL NEUTRONS, SAID RADIOACTIVE ISOTOPE HAVING AN ISOMERIC ENERGY LEVEL WITH A CHARACTERISTIC HALF LIFE OF ABOUT 20 MILLISECONDS AND WHICH DECAYS TO THE GROUND STATE BY THE EMMISSION OF GAMMA RADIATION OF ENERGY OF ABOUT 0.47 M.E.V., COMPRISING THE STEPS OF IRRADIATING THE FORMATIONS WITH NEUTRONS, DETECTING GAMMA RADIATION EMANATING FROM SAID FORMATIONS UPON THE IRRADIATION THEREOF WITH NEUTRONS,
Claim 2
Independent Claim
85 words
THE METHOD OF LOGGING THE FORMATIONS TRAVERSED BY A BOREHOLE FOR SALT WATER CONTAINING SODIUM WHICH FORMS THE RADIOACTIVE ISOTOPE SODIUM-24 UPON THE CAPTURE OF THERMAL NEUTRONS, SAID RADIOACTIVE ISOTOPE HAVING AN ISOMERIC ENERGY LEVEL WITH A CHARACTERISTIC HALF LIFE OF ABOUT 20 MILLISECONDS AND WHICH DECAYS TO THE GROUND STATE BY THE EMMISSION OF GAMMA RADIATION OF ENERGY OF ABOUT 0.47 M.E.V., COMPRISING THE STEPS OF IRRADIATING THE FORMATIONS WITH NEUTRONS, DETECTING GAMMA RADIATION EMANATING FROM SAID FORMATIONS UPON THE IRRADIATION THEREOF WITH NEUTRONS,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |