Patent US3211995A successfully refreshed from Google Patents.
US3211995A
Expired / Lapsed
US
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Method and apparatus for measuring an alternating current component in a circuit having a direct current component
Assignee: Hickok Electrical Instrument Co
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Filing: 1956-10-22
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Granted: 1965-10-12
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Davis S Wise
- 👤 George E Sutliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:30
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/24; G01R31/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
AN APPARATUS FOR CONNECTING A DIRECT CURRENT FROM A DIRECT CURRENT SOURCE OF SUBSTANTIALLY CONSTANT POTENTIAL TO A LOAD INCLUDING A BRIDGE CIRCUIT INTERPOSED IN SERIES WITH SAID SOURCE AND BETWEEN SAID SOURCE AND THE LOAD AND INCLUDING UNILATERAL CONDUCTING DEVICES IN ITS OPPOSITE LEGS AND CYCLIC CURRENT BIASING MEANS CONNECTED TO SAID DEVICES FOR BIASING SAID DEVICES IN ADJACENT LEGS ALTERNATELY TO CONDUCTION.
Claim 2
Independent Claim
64 words
AN APPARATUS FOR CONNECTING A DIRECT CURRENT FROM A DIRECT CURRENT SOURCE OF SUBSTANTIALLY CONSTANT POTENTIAL TO A LOAD INCLUDING A BRIDGE CIRCUIT INTERPOSED IN SERIES WITH SAID SOURCE AND BETWEEN SAID SOURCE AND THE LOAD AND INCLUDING UNILATERAL CONDUCTING DEVICES IN ITS OPPOSITE LEGS AND CYCLIC CURRENT BIASING MEANS CONNECTED TO SAID DEVICES FOR BIASING SAID DEVICES IN ADJACENT LEGS ALTERNATELY TO CONDUCTION.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |