Patent US4444596A successfully refreshed from Google Patents.
US3348136A
Expired / Lapsed
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⏱️ 0.0 years remaining
Gyromagnetic resonance apparatus utilizing two-sample signal comparison
Assignee: Varian Medical Systems Inc
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Filing: 1965-05-05
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Granted: 1967-10-17
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Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Forrest A Nelson
- 👤 George A Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:37
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
APPARATUS FOR MEASURING THE CONCENTRATION OF A PARAMAGNETIC SPECIES IN AN UNKNOWN SAMPLE, COMPRISING: MEANS FOR ACCOMMODING SAID UNKNOWN SAMPLE IN A MICROWAVE EXCITATION STRUCTURE; MEANS FOR ACCOMMODATING A PARAMAGNETIC REFERENCE SAMPLE IN A MIRCORWAVE EXCITATION STRUCTURE IN ELECTROMAGNETIC COUPLNG RELATION RELATIVE TO THE MICROWAVE STRUCTURE OF SAID UNKNOWN SAMPLE; MEANS FOR PRODUCING A D.C. POLARIZING MAGNETIC FIELD ENVELOPING BOTH SAMPLES; MEANS FOR EFFECTING AN ELECTRON PARAMAGNETIC RESONANCE SIGNAL OF SAID REFERENCE SAMPLE AND OF SAID UNKNOWN SAMPLE SIMULTANEOUSLY; A MEANS FOR SIMULTANEOUSLY COMPARING THE AMPLITUDE OF SAID REFERENCE AND UNKNOWN SAMPLE SIGNALS; AND MEANS FOR BALANCING SUCH COMPARED SIGNALS TO PROVIDE A NULL WHEREBY AN INDICATION OF THE CONCENTRATION OF UNKNOWN SAMPLE IS OBTAINED.
Claim 2
Dependent Claim
115 words
APPARATUS FOR MEASURING THE CONCENTRATION OF A PARAMAGNETIC SPECIES IN AN UNKNOWN SAMPLE, COMPRISING: MEANS FOR ACCOMMODING SAID UNKNOWN SAMPLE IN A MICROWAVE EXCITATION STRUCTURE; MEANS FOR ACCOMMODATING A PARAMAGNETIC REFERENCE SAMPLE IN A MIRCORWAVE EXCITATION STRUCTURE IN ELECTROMAGNETIC COUPLNG RELATION RELATIVE TO THE MICROWAVE STRUCTURE OF SAID UNKNOWN SAMPLE; MEANS FOR PRODUCING A D.C. POLARIZING MAGNETIC FIELD ENVELOPING BOTH SAMPLES; MEANS FOR EFFECTING AN ELECTRON PARAMAGNETIC RESONANCE SIGNAL OF SAID REFERENCE SAMPLE AND OF SAID UNKNOWN SAMPLE SIMULTANEOUSLY; A MEANS FOR SIMULTANEOUSLY COMPARING THE AMPLITUDE OF SAID REFERENCE AND UNKNOWN SAMPLE SIGNALS; AND MEANS FOR BALANCING SUCH COMPARED SIGNALS TO PROVIDE A NULL WHEREBY AN INDICATION OF THE CONCENTRATION OF UNKNOWN SAMPLE IS OBTAINED.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |