US3377552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for testing impedances between a plurality of conductors
Assignee: AT&T Inc
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Filing: 1964-11-17
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Granted: 1968-04-09
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Expires: 1984-11-17
Abstract
No abstract record available.
Inventors
- 👤 Roger D Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:33
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A TEST INSTRUMENT FOR TESTING IMPEDANCE VALUES BETWEEN THREE CONDUCTORS, COMPRISING ENGAGEMENT MEANS FORMING THREE POINTS FOR ESTABLISHING CONNECTIONS BETWEEN EACH OF SAID CONDUCTORS AND A DIFFERENT ONE OF SAID THREE POINTS, FIRST AND SECOND IMPEDANCE MEANS EACH CONNECTED TO A DIFFERENT ONE OF TWO OF SAID POINTS, VOLTAGE MEANS HAVING AN INTERMEDIATE-VALUE CONNECTION CONNECTED TO SAID THIRD POINT AND HAVING TWO EXTREME CONNECTIONS EACH CONNECTED TO A DIFFERENT ONE OF SAID IMPEDANCE MEANS FOR ESTABLISHING AT SAID FIRST TWO POINTS RESPECTIVE VOLTAGES ONE OF WHICH IS MORE POSITIVE AND ONE MORE NEGATIVE THAN THE VOLTAGE AT SAID THIRD POINT, AND TWO MEASURING MEANS EACH CONNECTED TO A DIFFERENT ONE OF SAID FIRST TWO POINTS AND THE THIRD POINT.
Claim 2
Dependent Claim
119 words
A TEST INSTRUMENT FOR TESTING IMPEDANCE VALUES BETWEEN THREE CONDUCTORS, COMPRISING ENGAGEMENT MEANS FORMING THREE POINTS FOR ESTABLISHING CONNECTIONS BETWEEN EACH OF SAID CONDUCTORS AND A DIFFERENT ONE OF SAID THREE POINTS, FIRST AND SECOND IMPEDANCE MEANS EACH CONNECTED TO A DIFFERENT ONE OF TWO OF SAID POINTS, VOLTAGE MEANS HAVING AN INTERMEDIATE-VALUE CONNECTION CONNECTED TO SAID THIRD POINT AND HAVING TWO EXTREME CONNECTIONS EACH CONNECTED TO A DIFFERENT ONE OF SAID IMPEDANCE MEANS FOR ESTABLISHING AT SAID FIRST TWO POINTS RESPECTIVE VOLTAGES ONE OF WHICH IS MORE POSITIVE AND ONE MORE NEGATIVE THAN THE VOLTAGE AT SAID THIRD POINT, AND TWO MEASURING MEANS EACH CONNECTED TO A DIFFERENT ONE OF SAID FIRST TWO POINTS AND THE THIRD POINT.
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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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |