US3289072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analysis of substances by measurement of nuclear magnetic relaxation times
Assignee: Schlumberger Well Surveying Corp
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Filing: 1953-01-13
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Granted: 1966-11-29
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Expires: 1973-01-13
Abstract
No abstract record available.
Inventors
- 👤 Nick A Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:41
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
IN APPARATUS FOR GEOPHYSICAL EXPLORATION IN WELLS DRILLED INTO THE EARTH, THE COMBINATION OF MEANS MOUNTED FOR MOVEMENT THROUGH A WALL FOR ESTABLISHING A SUBSTANTIALLY CONSTANT MAGNETIC FIELD AT A GIVEN REGION IN A WELL, MEANS FOR ESTABLISHING AN ALTERNATING MAGNETIC FIELD AT SAID REGION AND DISPOSED AT AN ANGLE TO SAID CONSTANT FIELD, THE FREQUENCY OF SAID ALTERNATING FIELD BEING SUBSTANTIALLY EQUAL TO THE FREQUENCY OF PRECESSION OF NUCLEI EMBODYING MAGNETIC PROPERTIES AND COMPRISING MOLECULES OF MATERIAL IN SAID REGION, MEANS FOR AUTOMATICALLY MAIN-
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |