US3270142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable impedance electrical circuits
Assignee: Post Office
•
Filing: 1963-05-13
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Granted: 1966-08-30
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Wilson Frederick Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:57
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/58; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN ELECTRICAL CIRCUIT INCLUDING A TRANSISTOR HAVING A BASE-EMITTER CIRCUIT ARRANGED FOR OPERATION AS A HALF-WAVE RECITIFIER, A PAIR OF INPUT TERMINALS CONNECTED TO THE BASEEMITTER CIRCUIT FOR THE SUPPLY OF A.C. INPUT SIGNALS THERETO, A PAIR OF OUTPUT TERMINALS, A CURRENT CONTROLLABLE IMPEDANCE NETWORK BRIDGING THE OUTPUT TERMINALS, MEANS CONNECTING THE COLLECTOR OF THE TRANSISTOR TO THE IMPEDANCE NETWORK TO SUPPLY COLLECTOR CURRENT THERETO FOR CONTROLLING THE IMPEDANCE OF THE SAID NETWORK.
Claim 2
Dependent Claim
73 words
AN ELECTRICAL CIRCUIT INCLUDING A TRANSISTOR HAVING A BASE-EMITTER CIRCUIT ARRANGED FOR OPERATION AS A HALF-WAVE RECITIFIER, A PAIR OF INPUT TERMINALS CONNECTED TO THE BASEEMITTER CIRCUIT FOR THE SUPPLY OF A.C. INPUT SIGNALS THERETO, A PAIR OF OUTPUT TERMINALS, A CURRENT CONTROLLABLE IMPEDANCE NETWORK BRIDGING THE OUTPUT TERMINALS, MEANS CONNECTING THE COLLECTOR OF THE TRANSISTOR TO THE IMPEDANCE NETWORK TO SUPPLY COLLECTOR CURRENT THERETO FOR CONTROLLING THE IMPEDANCE OF THE SAID NETWORK.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |