Patent US197310A successfully refreshed from Google Patents.
US3299352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring an unknown impedance by comparison with a standard impedance
Assignee: Individual
•
Filing: 1963-08-12
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Granted: 1967-01-17
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Paul E Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:47
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD FOR MEASURING THE RESISTANCE AND REACTANCE OF AN UNKNOWN IMPEDANCE BY COMPARISON WITH A STANDARD IMPEDANCE CONNECTED IN SERIES THEREWITH AND INCLUDING RESISTANCE AND REACTANCE, AND WHICH METHOD COMPRISES: APPLYING AN A.C. VOLTAGE ACROSS AT LEAST ONE OF SAID PARING THE PHASE OF THE VOLTAGE ACROSS AT LEAST ONE OF SAID IMPEDANCES WITH THE PHASE OF THE VOLTAGE ACROSS THE OTHER OF SAID IMPEDANCES, ADJUSTING THE RESISTANCE AND/OR REACTANCE OF SAID STANDARD IMPEDANCE UNTIL SAID PHASES ARE EQUAL, COMPARING THE VALUE OF THE VOLTAGE ACROSS AT LEAST ONE OF SAID IMPEDANCES WITH THE VALUE OF THE VOLTAGE ACROSS THE OTHER OF SAID IMPEDANCES AND DETERMINING THE RESISTANCE AND REACTANCE OF SAID UNKNOWN IMPEDANCE FROM THE RELATIONSHIP RU/RS=XU/XS=VU/VS, WHERE VU, RU AND XU ARE RESPECTIVELY THE VOLTAGE ACROSS AND THE RESISTANCE AND REACTANCE OF SAID UNKNOWN IMPEDANCE, AND VS, RS AND XS ARE RESPECTIVELY THE VOLTAGE ACROSS AND THE RESISTANCE AND REACTANCE OF SAID STANDARD IMPEDANCE.
Claim 2
Independent Claim
157 words
A METHOD FOR MEASURING THE RESISTANCE AND REACTANCE OF AN UNKNOWN IMPEDANCE BY COMPARISON WITH A STANDARD IMPEDANCE CONNECTED IN SERIES THEREWITH AND INCLUDING RESISTANCE AND REACTANCE, AND WHICH METHOD COMPRISES: APPLYING AN A.C. VOLTAGE ACROSS AT LEAST ONE OF SAID PARING THE PHASE OF THE VOLTAGE ACROSS AT LEAST ONE OF SAID IMPEDANCES WITH THE PHASE OF THE VOLTAGE ACROSS THE OTHER OF SAID IMPEDANCES, ADJUSTING THE RESISTANCE AND/OR REACTANCE OF SAID STANDARD IMPEDANCE UNTIL SAID PHASES ARE EQUAL, COMPARING THE VALUE OF THE VOLTAGE ACROSS AT LEAST ONE OF SAID IMPEDANCES WITH THE VALUE OF THE VOLTAGE ACROSS THE OTHER OF SAID IMPEDANCES AND DETERMINING THE RESISTANCE AND REACTANCE OF SAID UNKNOWN IMPEDANCE FROM THE RELATIONSHIP RU/RS=XU/XS=VU/VS, WHERE VU, RU AND XU ARE RESPECTIVELY THE VOLTAGE ACROSS AND THE RESISTANCE AND REACTANCE OF SAID UNKNOWN IMPEDANCE, AND VS, RS AND XS ARE RESPECTIVELY THE VOLTAGE ACROSS AND THE RESISTANCE AND REACTANCE OF SAID STANDARD IMPEDANCE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |