US3274485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring magnetic field gradients by nuclear resonance, and applications thereof
Assignee: SUD AVIAT SOC NAT DE CONST
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Filing: 1962-07-18
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Granted: 1966-09-20
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Denis Andre
- 👤 Ripart Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:21
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/24; G01R33/02; G01R33/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
APPARATUS FOR MEASURING BY NUCLEAR RESONANCE THE GRADIENT OF A MAGNETIC FIELD BETWEEN TWO PREDETERMINED POINTS COMPRSING, IN COMBINATION, A PROTON-FREQUENCY OSCILLATOR LOCATED AT ONE OF THE PREDETERMINED POINTS AND ONLY SUBJECTED TO THE ACTION OF THE MAGNETIC FIELD THE GRADIENT OF WHICH IS TO BE MEASURED, WEAK COUPLING MEANS CONNECTED TO SAID PROTON-FREQUENCY OSCILLATOR AT THE OUTPUT THEREOF, A PROTON RESONANCE PROBE LOCATED AT THE OTHER OF THE PREDETERMINED POINTS AND FED BY SAID PROTONFREQUENCY OSCILLATOR THROUGH SAID WEAK COUPLING MEANS, MEANS CONNECTED TO SAID PROTON-FREQUENCY OSCILATOR AND SAID PROTON PROBE AT THE OUTPUTS THEREOF FOR GENERATING A CURRENT WHICH IS A FUNCTION OF THE PHASE SHIFT BETWEEN THE OUTPUT SIGNALS OF SAID OSCILLATOR AND OF SAID PROBE AND THEREBY A FUNCTION OF THE MAGNETIC FIELD GRADIENT BETWEEN SAID PREDETERMINED POINTS, AND A DEVICE SENSITIVE TO A CURRENT VALUE AND CONNECTED TO SAID CURRENT GENERATING MEANS.
Claim 2
Dependent Claim
147 words
APPARATUS FOR MEASURING BY NUCLEAR RESONANCE THE GRADIENT OF A MAGNETIC FIELD BETWEEN TWO PREDETERMINED POINTS COMPRSING, IN COMBINATION, A PROTON-FREQUENCY OSCILLATOR LOCATED AT ONE OF THE PREDETERMINED POINTS AND ONLY SUBJECTED TO THE ACTION OF THE MAGNETIC FIELD THE GRADIENT OF WHICH IS TO BE MEASURED, WEAK COUPLING MEANS CONNECTED TO SAID PROTON-FREQUENCY OSCILLATOR AT THE OUTPUT THEREOF, A PROTON RESONANCE PROBE LOCATED AT THE OTHER OF THE PREDETERMINED POINTS AND FED BY SAID PROTONFREQUENCY OSCILLATOR THROUGH SAID WEAK COUPLING MEANS, MEANS CONNECTED TO SAID PROTON-FREQUENCY OSCILATOR AND SAID PROTON PROBE AT THE OUTPUTS THEREOF FOR GENERATING A CURRENT WHICH IS A FUNCTION OF THE PHASE SHIFT BETWEEN THE OUTPUT SIGNALS OF SAID OSCILLATOR AND OF SAID PROBE AND THEREBY A FUNCTION OF THE MAGNETIC FIELD GRADIENT BETWEEN SAID PREDETERMINED POINTS, AND A DEVICE SENSITIVE TO A CURRENT VALUE AND CONNECTED TO SAID CURRENT GENERATING MEANS.
References Cited (Backward Citations)
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Cited
US2975360A
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FR1212406A
Cited
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US3127556A
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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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |