Patent US3250986A successfully refreshed from Google Patents.
US3250986A
Expired / Lapsed
US
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Magnetic resonance method and apparatus for analyzing substances
Assignee: Texaco Inc
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Filing: 1953-05-01
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Granted: 1966-05-10
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Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
- 👤 Alexander S Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:08
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN WELL LOGGING, THE IMPROVEMENT WHICH COMPRISES PRODUCING UNIDIRECTIONAL AND ALTERNATING MAGNETIC FIELDS PROPORTIONED AND ORIENTED WITH RESPECT TO ONE ANOTHER TO CAUSE NUCLEI OF A CERTAIN TYPE TO RESONATE, EXPOSING PORTIONS OF THE FORMATIONS SURROUNDING A WELL TO BE LOGGED TO SAID MAGNETIC FIELDS FOR A PREDETERMINED INTERVAL OF TIME TO CAUSE SAID NUCLEI TO ATTAIN A RESONANT CONDITION, SAID INTERVAL OF TIME BEING LESS THAN A PREDETERMINED LONGER DURATION OF TIME SUFFICIENT TO CAUSE CERTAIN OTHER NON-SELECTED NUCLEI HAVING LONGER RELAXATION TIMES TO ATTAIN A RESONANT CONDITION, AND DETECTING THE RESPONSE OF THE NUCLEI TO SAID MAGNETIC FIELDS IN ORDER TO PROVIDE AN INDICATION OF THE PRESENCE OF SAID CERTAIN NUCLEI IN THE PORTIONS OF THE FORMATIONS EXPOSED TO SAID FIELDS.
Claim 2
Dependent Claim
123 words
IN WELL LOGGING, THE IMPROVEMENT WHICH COMPRISES PRODUCING UNIDIRECTIONAL AND ALTERNATING MAGNETIC FIELDS PROPORTIONED AND ORIENTED WITH RESPECT TO ONE ANOTHER TO CAUSE NUCLEI OF A CERTAIN TYPE TO RESONATE, EXPOSING PORTIONS OF THE FORMATIONS SURROUNDING A WELL TO BE LOGGED TO SAID MAGNETIC FIELDS FOR A PREDETERMINED INTERVAL OF TIME TO CAUSE SAID NUCLEI TO ATTAIN A RESONANT CONDITION, SAID INTERVAL OF TIME BEING LESS THAN A PREDETERMINED LONGER DURATION OF TIME SUFFICIENT TO CAUSE CERTAIN OTHER NON-SELECTED NUCLEI HAVING LONGER RELAXATION TIMES TO ATTAIN A RESONANT CONDITION, AND DETECTING THE RESPONSE OF THE NUCLEI TO SAID MAGNETIC FIELDS IN ORDER TO PROVIDE AN INDICATION OF THE PRESENCE OF SAID CERTAIN NUCLEI IN THE PORTIONS OF THE FORMATIONS EXPOSED TO SAID FIELDS.
References Cited (Backward Citations)
US2139460A
Cited
US2259904A
Cited
US2480674A
Cited
US2570111A
Cited
US2535666A
Cited
US2721970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |