Patent US5278769A successfully refreshed from Google Patents.
US3296533A
Expired / Lapsed
US
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Method and apparatus for measuring the intensity of the magnetic component of weak elctromagnetic fields of radio frequencies
Assignee: Czech Academy of Sciences
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Filing: 1965-04-19
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Granted: 1967-01-03
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Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Karpinsky Jurij
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:44
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/028; G01R33/0283; G01R29/00; G01R29/08; G01R29/0864; G01R29/0871; G01R29/10; G01V; G01V3/00; G01V3/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A METHOD FOR MEASURING THE INTENSITY OF THE MAGNETIC COMPONENT OF WEAK ELECTROMAGNETIC FIELDS WITH A LOOP ANTENNA CONNECTED AT LEAST IN PART IN PARALLEL WITH THE INPUT OF AN A.C. VOLTAGE MEASURING DEVICE AND WITH THE OUTPUT OF A CALIBRATING SIGNAL GENERATOR, THE METHOD COMPRISING DETERMINING THE CALIBRATING NORTON EQUIVALENT CURRENT OF SAID SIGNAL GENERATOR, MEASURING WITH SAID A.C. VOLTAGE MEASURING DEVICE A FIRST VOLTAGE DUE TO THE NORTON EQUIVALENT CURRENT OF SAID LOOP ANTENNA ACTED UPON BY THE MEASURED FIELD, MEASURING WITH SAID A.C.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |