US3235791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gain controls using silicon diodes, a d.c. control source and an a.c. bias source
Assignee: Pan American Petroleum Corp
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Filing: 1961-09-05
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Granted: 1966-02-15
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 James W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24; G01V1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN AN ALTERNATING-CURRENT SIGNAL-CHANNEL ATTENUATOR CIRCUIT COMPRISING A RESISTANCE IN SERIES IN A SIGNAL-CARRYING LEAD AND A SHUNT RESISTANCE CONNECTED BETWEEN SAID LEAD AND GROUND, WHEREIN AT LEAST ONE OF SAID RESISTANCES IS VARIABLE AND NON-LINEAR AND COMPRISES AT LEAST ONE SILICON DIODE MEANS FOR APPLYING A DIRECT-CURRENT POTENTIAL TO SAID DIODE TO VARY ITS EFFECTIVE RESISTANCE FOR SIGNALS, SAID DIRECT-CURRENT POTENTIAL BEING LARGE COMPARED TO THE MAXIMUM SIGNAL VOLTAGE TO BE ATTENUATED, THE IMPROVEMENT WHICH COMPRISES MEANS FOR APPLYING ALSO
Claim 2
Dependent Claim
81 words
IN AN ALTERNATING-CURRENT SIGNAL-CHANNEL ATTENUATOR CIRCUIT COMPRISING A RESISTANCE IN SERIES IN A SIGNAL-CARRYING LEAD AND A SHUNT RESISTANCE CONNECTED BETWEEN SAID LEAD AND GROUND, WHEREIN AT LEAST ONE OF SAID RESISTANCES IS VARIABLE AND NON-LINEAR AND COMPRISES AT LEAST ONE SILICON DIODE MEANS FOR APPLYING A DIRECT-CURRENT POTENTIAL TO SAID DIODE TO VARY ITS EFFECTIVE RESISTANCE FOR SIGNALS, SAID DIRECT-CURRENT POTENTIAL BEING LARGE COMPARED TO THE MAXIMUM SIGNAL VOLTAGE TO BE ATTENUATED, THE IMPROVEMENT WHICH COMPRISES MEANS FOR APPLYING ALSO
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |