Patent US3566256A successfully refreshed from Google Patents.
US3566256A
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US
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Frequency swept sideband gyromagnetic resonance spectrometer
Assignee: Varian Medical Systems Inc
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Filing: 1969-06-16
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Granted: 1971-02-23
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Expires: 1989-06-16
Abstract
Abstract A FREQUENCY SWEPT SIDEBAND GYROMAGNETIC RESONANCE SPECTROMETER IS DISCLOSED WHEREIN A RADIO FREQUENCY CARRIER SIGNAL IS COMBINED WITH FIRST AND SECOND AUDIO MODULATION FREQUENCIES TO EXCITE SIDEBAND RESONANCES OF BOTH A FIELD-FREQUENCY CONTROL GROUP AND A SAMPLE UNDER ANALYSIS. THE CARRIER FREQUENCY IS SWEPT IN FREQUENCY IN ONE SENSE TO SWEEP ONE SIDEBAND THROUGHT THE RESONANCE SEPECTRUM OF THE SAMPLE WITH A FIXED FREQUENCY AUDIO MODULATION, WHEREAS THE AUDIO MODULATION FREQUENCY TO PRODUCE THE CONTROL SIDEBAND IS SWEEP IN THE OPPOSITE FREQUENCY SENSE TO THAT OF THE CARRIER TO PRODUCE A FIXED SIDEBAND FREQUENCY FOR EXCITING THE CONTROL GROUP.
Inventors
- 👤 Le Roy F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:56
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/46
Claims Analysis
Total Claims: 0
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |