US3360716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyromagnetic resonance methods and apparatus
Assignee: Varian Medical Systems Inc
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Filing: 1965-02-23
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Granted: 1967-12-26
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Arnold L Bloom
- 👤 Dolan L Mansir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:28
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
APPARATUS FOR DETERMINING THE THERMAL RELAXATION TIME T1 OF A SAMPLE OF MATTER POSSESSING GYROMAGNETIC ATOM PORTIONS LOCATED IN A FIRST UNIDIRECTIONAL MAGNETIC FIELD COMPRISING MEANS FOR PROVIDING A SECOND UNIDIRECTIONAL MAGNETIC FIELD TO THE SAMPLE STRONGER THAN AND AT AN ANGLE TO SAID FIRST MAGNETIC FIELD FOR POLARIZING THE ATOM PORTIONS IN SAID SECOND MAGNETIC FIELD, SAID POLARIZING FIELD BEING APPLIED IN SUCCESSIVE TIME SPACED PULSES, THE POLARIZING FIELD IN EACH PULSE BEING DECREASED TO ZERO SLOWLY SO THAT THE POLARIZED ATOM PORTIONS ARE ALIGNED IN SAID FIRST MAGNETIC FIELD AFTER EACH POLARIZING PULSE, MEANS FOR APPLYING AN ALTERNATE MAGNETIC FIELD OF THE LARMOR FREQUENCY OF THE ATMO PORTIONS TO THE SAMPLE AT AN ANGLE TO SAID FIRST MAGNETIC FIELD A SPACED TIME PERIOD AFTER TERMINATION OF EACH POLARIZING PULSE FOR PRODUCING A FORCED PRECESSION OF THE ATOM PORTIONS IN SAID FIRST MAGNETIC FIELD, THE TIME PERIODS BETWEEN TERMINATION OF THE POLARIZING PULSE AND INITIATION OF THE ALTERNATING FREQUENCY FIELD VARYING PROGRESSIVELY FOR SUCCESSIVE CYCLES, AND MEANS FOR DETECTING THE FREE PRECESSION OF THE ATOM PORTIONS IN SAID FIRST MAGNETIC FIELD AFTER TERMINATION OF THE ALTERNATING FIELD IN EACH CYCLE, THE INITIAL PEAK AMPLITUDES OF THE SUCCESSIVE FREE PRECESSION SIGNALS PRODUCING AN ENVELOPE CURVE FRROM WHICH THE THERMAL RELAXATION TIME OF THE SAMPLE MAY BE DETERMINED.
Claim 2
Dependent Claim
217 words
APPARATUS FOR DETERMINING THE THERMAL RELAXATION TIME T1 OF A SAMPLE OF MATTER POSSESSING GYROMAGNETIC ATOM PORTIONS LOCATED IN A FIRST UNIDIRECTIONAL MAGNETIC FIELD COMPRISING MEANS FOR PROVIDING A SECOND UNIDIRECTIONAL MAGNETIC FIELD TO THE SAMPLE STRONGER THAN AND AT AN ANGLE TO SAID FIRST MAGNETIC FIELD FOR POLARIZING THE ATOM PORTIONS IN SAID SECOND MAGNETIC FIELD, SAID POLARIZING FIELD BEING APPLIED IN SUCCESSIVE TIME SPACED PULSES, THE POLARIZING FIELD IN EACH PULSE BEING DECREASED TO ZERO SLOWLY SO THAT THE POLARIZED ATOM PORTIONS ARE ALIGNED IN SAID FIRST MAGNETIC FIELD AFTER EACH POLARIZING PULSE, MEANS FOR APPLYING AN ALTERNATE MAGNETIC FIELD OF THE LARMOR FREQUENCY OF THE ATMO PORTIONS TO THE SAMPLE AT AN ANGLE TO SAID FIRST MAGNETIC FIELD A SPACED TIME PERIOD AFTER TERMINATION OF EACH POLARIZING PULSE FOR PRODUCING A FORCED PRECESSION OF THE ATOM PORTIONS IN SAID FIRST MAGNETIC FIELD, THE TIME PERIODS BETWEEN TERMINATION OF THE POLARIZING PULSE AND INITIATION OF THE ALTERNATING FREQUENCY FIELD VARYING PROGRESSIVELY FOR SUCCESSIVE CYCLES, AND MEANS FOR DETECTING THE FREE PRECESSION OF THE ATOM PORTIONS IN SAID FIRST MAGNETIC FIELD AFTER TERMINATION OF THE ALTERNATING FIELD IN EACH CYCLE, THE INITIAL PEAK AMPLITUDES OF THE SUCCESSIVE FREE PRECESSION SIGNALS PRODUCING AN ENVELOPE CURVE FRROM WHICH THE THERMAL RELAXATION TIME OF THE SAMPLE MAY BE DETERMINED.
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) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |