Patent US2240617A successfully refreshed from Google Patents.
US3102959A
Expired / Lapsed
US
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Device for amplifying, producing or modulating electrical oscillations
Assignee: US Philips Corp
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Filing: 1958-06-16
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Granted: 1963-09-03
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Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Diemer Gesinus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
H; H03; H03F; H03F17/00; H01; H01C; H01C7/00; H01C7/10; H03B; H03B17/00; H03B7/00; H03B7/12; H03B7/14; H03C; H03C1/00; H03C1/08; H03C1/34; H03D; H03D7/00; H03F15/00; H10; H10P; H10P95/00; H03C7/00; H03C7/02; H03C7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN ELECTRICAL DEVICE COMPRISING A CARRIER-DENSITY, ELECTRIC-FIELD-QUENCHABLE, PHOTOCONDUCTIVE BODY HAVING THE PROPERTY THAT ANY FREE CHARGE CARRIER CONCENTRATION WITHIN IT GREATER THAN THAT CORRESPONDING TO THERMAL EQUILIBRIUM IS REDUCED IN THE PRESENCE OF AN ELECTRIC FIELD, ELECTRODE MEANS COUPLED TO THE BODY INCLUDING A VOLTAGE SOURCE FOR CAUSING TO PASS THROUGH THE BODY BETWEEN THE ELECTRODE MEANS A CURRENT WHOSE MAGNITUDE DEPENDS UPON THE FREE CHARGE CARRIER CONCENTRATION WITHIN THE BODY, WHICH PRODUCE A CURRENT-VOLTAGE CHARACTERISTIC OF THE DEVICE, MEANS FOR ESTABLISHING WITHIN THE BODY A FREE CHARGE CARRIER CONCENTRATION GREATER THAN THAT CORRESPONDING TO THERMAL EQUALIBRIUM TO INCREASE THE CURRENT THROUGH THE BODY BETWEEN THE ELECTRODE MEANS, AND MEANS FOR ESTABLISHING AN ELECTRIC FIELD WITHIN THE BODY THAT REDUCES THE CONCENTRATION OF FREE CHARGE CARRIERS AND THUS THE CURRENT FLOW BETWEEN THE ELECTRODE MEANS, WHEREBY THE CURRENT-VOLTAGE CHARACTERISTIC OF THE DEVICE EXHIBITS A REGION OF NEGATIVE SLOPE.
Claim 2
Dependent Claim
148 words
AN ELECTRICAL DEVICE COMPRISING A CARRIER-DENSITY, ELECTRIC-FIELD-QUENCHABLE, PHOTOCONDUCTIVE BODY HAVING THE PROPERTY THAT ANY FREE CHARGE CARRIER CONCENTRATION WITHIN IT GREATER THAN THAT CORRESPONDING TO THERMAL EQUILIBRIUM IS REDUCED IN THE PRESENCE OF AN ELECTRIC FIELD, ELECTRODE MEANS COUPLED TO THE BODY INCLUDING A VOLTAGE SOURCE FOR CAUSING TO PASS THROUGH THE BODY BETWEEN THE ELECTRODE MEANS A CURRENT WHOSE MAGNITUDE DEPENDS UPON THE FREE CHARGE CARRIER CONCENTRATION WITHIN THE BODY, WHICH PRODUCE A CURRENT-VOLTAGE CHARACTERISTIC OF THE DEVICE, MEANS FOR ESTABLISHING WITHIN THE BODY A FREE CHARGE CARRIER CONCENTRATION GREATER THAN THAT CORRESPONDING TO THERMAL EQUALIBRIUM TO INCREASE THE CURRENT THROUGH THE BODY BETWEEN THE ELECTRODE MEANS, AND MEANS FOR ESTABLISHING AN ELECTRIC FIELD WITHIN THE BODY THAT REDUCES THE CONCENTRATION OF FREE CHARGE CARRIERS AND THUS THE CURRENT FLOW BETWEEN THE ELECTRODE MEANS, WHEREBY THE CURRENT-VOLTAGE CHARACTERISTIC OF THE DEVICE EXHIBITS A REGION OF NEGATIVE SLOPE.
References Cited (Backward Citations)
US2582850A
Cited
US2794863A
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US2778956A
Cited
FR1089676A
Cited
US2860218A
Cited
US2862189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |