US3259835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-impedance electric circuits
Assignee: The General Electric Company PLC
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Filing: 1962-11-20
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Granted: 1966-07-05
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Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 Mcpherson John Wemyss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:52
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A VARIABLE-IMPEDANCE ELECTRIC CIRCUIT COMPRISING AN INPUT TERMINAL, AND OUTPUT TERMINAL, A PLURALITY OF PATHS, MEANS TO CONNECT SAID PATHS IN PARALLEL BETWEEN THE INPUT AND OUTPUT TERMINALS, A PLURALITY OF TRANSISTOR EQUAL IN NUMBER TO THE NUMBER OF SAID PATHS, EACH TRANSISTOR HAVING FIRST AND SECOND ELECTRODES AND A CONTROL ELECTRODE, EACH ONE OF SAID PATHS INCLUDING THE PATH BETWEEN SAID FIRST AND SECOND ELECTRODES OF RESPECTIVE ONE OF SAID TRANSISTORS, AT LEAST ONE OF SAID PLURALITY OF PATHS INCLUDING A RESISTANCE CONNECTED DIRECTLY IN SERIES WITH THE RESPECTIVE TRANSISTOR, A POTENTIAL DIVIDING NETWORK, THE CONTROL ELECTRODES OF SAID TRANSISTORS EACH BEING CONNECTED TO A RESPECTIVE TAPPING POINT OF THE POTENTIAL DIVIDING NETWORK, AND MEANS FOR APPLYING A VARIABLE VOLTAGE ACROSS
Claim 2
Dependent Claim
122 words
A VARIABLE-IMPEDANCE ELECTRIC CIRCUIT COMPRISING AN INPUT TERMINAL, AND OUTPUT TERMINAL, A PLURALITY OF PATHS, MEANS TO CONNECT SAID PATHS IN PARALLEL BETWEEN THE INPUT AND OUTPUT TERMINALS, A PLURALITY OF TRANSISTOR EQUAL IN NUMBER TO THE NUMBER OF SAID PATHS, EACH TRANSISTOR HAVING FIRST AND SECOND ELECTRODES AND A CONTROL ELECTRODE, EACH ONE OF SAID PATHS INCLUDING THE PATH BETWEEN SAID FIRST AND SECOND ELECTRODES OF RESPECTIVE ONE OF SAID TRANSISTORS, AT LEAST ONE OF SAID PLURALITY OF PATHS INCLUDING A RESISTANCE CONNECTED DIRECTLY IN SERIES WITH THE RESPECTIVE TRANSISTOR, A POTENTIAL DIVIDING NETWORK, THE CONTROL ELECTRODES OF SAID TRANSISTORS EACH BEING CONNECTED TO A RESPECTIVE TAPPING POINT OF THE POTENTIAL DIVIDING NETWORK, AND MEANS FOR APPLYING A VARIABLE VOLTAGE ACROSS
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |