US3376423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light responsive circuit which prevents photosensitive device saturation
Assignee: RCA Corp
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Filing: 1965-03-15
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Granted: 1968-04-02
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Emrys C James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:45
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K17/795
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A CIRCUIT COMPRISING A LIGHT RESPONSIVE SEMICONDUCTOR HAVING FIRST AND SECOND ELECTRODES, MEANS FOR COUPLING FIRST AND SECOND REFERENCE POTENTIALS TO SAID FIRST AND SECOND ELECTRODES, RESPECTIVELY, WHERE SAID FIRST REFERENCE POTENTIAL IS MORE POSITIVE THAN SAID SECOND, A DIODE HAVING A CATHODE AND AN ANODE, A TRANSISTOR HAVING A BASE, COLLECTOR AND EMITTER, MEANS FOR COUPLING ONE OF SAID ANODE AND CATHODE, ONE OF SAID FIRST AND SECOND ELECTRODES, AND SAID TRANSISTOR BASE TOGETHER AND THE OTHER OF SAID ANODE AND CATHODE TO A THIRD REFERENCE POTENTIAL INTERMEDIATE SAID FIRST AND SECOND POTENTIALS, AND MEANS FOR COUPLING SAID TRANSISTOR COLLECTOR AND EMITTER, RESPECTIVELY, TO FOURTH AND FIFTH REFERENCE POTENTIALS.
References Cited (Backward Citations)
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Cited
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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) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |