Patent US3244968A successfully refreshed from Google Patents.
US3244968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin decoupling of gyromagnetic particles
Assignee: Varian Medical Systems Inc
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Filing: 1963-02-26
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Granted: 1966-04-05
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Expires: 1983-02-26
Abstract
No abstract record available.
Inventors
- 👤 Forrest A Nelson
- 👤 George A Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:31
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD OF DECOUPLING THE SPINS OF A SECOND GROUP OF GYROMAGNETIC PARTICLES FROM THE SPINS OF A FIRST GROUP OF GYROMAGNETIC PARTICLES IN A SAMPLE CONTAINING AT LEAST SAID FIRST AND SECOND GROUPS IN A POLARIZING UNIDIRECTIONAL MAGNETIC FIELD, WHICH METHOD COMPRISES: APPLYING TO SAID SAMPLE A FIRST ALTERNATING MAGNETIC FIELD HAVING A FREQUENCY SUBSTANTIALLY THAT OF THE LARMOR FREQUENCY OF SAID FIRST GROUP IN SAID UNIDIRECTIONAL FIELD, AND DETECTING THE GYROMAGNETIC RESONANCE OF SUCH FIRST GROUP; APPLYING A SECOND ALTERNATING MAGNETIC FIELD TO SAID PARTICLES AT A FREQUENCY SUBSTANTIALLY EQUAL TO THE GYROMAGNETIC RESONANCE FREQUENCY OF SAID SECOND GROUP OF PARTICLES IN SAID UNIDIRECTIONAL FIELD; AND APPLYING A THIRD ALTERNATING MAGNETIC FIELD TO SAID PARTICLES AT A FREQUENCY SUBSTANTIALLY EQUAL TO THE GYROMAGNETIC RESONANCE FREQUENCY OF SAID SECOND GROUP OF PARTICLES IN A MAGNETIC FIELD HAVING AN AMPLITUDE SUBSTANTIALLY EQUAL TO THE AMPLITUDE OF SAID SECOND ALTERNATING MAGNETIC FIELD.
Claim 2
Independent Claim
151 words
THE METHOD OF DECOUPLING THE SPINS OF A SECOND GROUP OF GYROMAGNETIC PARTICLES FROM THE SPINS OF A FIRST GROUP OF GYROMAGNETIC PARTICLES IN A SAMPLE CONTAINING AT LEAST SAID FIRST AND SECOND GROUPS IN A POLARIZING UNIDIRECTIONAL MAGNETIC FIELD, WHICH METHOD COMPRISES: APPLYING TO SAID SAMPLE A FIRST ALTERNATING MAGNETIC FIELD HAVING A FREQUENCY SUBSTANTIALLY THAT OF THE LARMOR FREQUENCY OF SAID FIRST GROUP IN SAID UNIDIRECTIONAL FIELD, AND DETECTING THE GYROMAGNETIC RESONANCE OF SUCH FIRST GROUP; APPLYING A SECOND ALTERNATING MAGNETIC FIELD TO SAID PARTICLES AT A FREQUENCY SUBSTANTIALLY EQUAL TO THE GYROMAGNETIC RESONANCE FREQUENCY OF SAID SECOND GROUP OF PARTICLES IN SAID UNIDIRECTIONAL FIELD; AND APPLYING A THIRD ALTERNATING MAGNETIC FIELD TO SAID PARTICLES AT A FREQUENCY SUBSTANTIALLY EQUAL TO THE GYROMAGNETIC RESONANCE FREQUENCY OF SAID SECOND GROUP OF PARTICLES IN A MAGNETIC FIELD HAVING AN AMPLITUDE SUBSTANTIALLY EQUAL TO THE AMPLITUDE OF SAID SECOND ALTERNATING MAGNETIC FIELD.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |