US3214591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit and structure for photo-amplifier using one large and one small photocell
Assignee: RCA Corp
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Filing: 1961-12-07
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Granted: 1965-10-26
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Expires: 1981-12-07
Abstract
No abstract record available.
Inventors
- 👤 Charles P Hadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; H; H10; H10F; H10F55/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A PHOTO-AMPLIFYING DEVICE COMPRISING A TRANSPARENT SUPPORT MEMBER, A FIRST AND A SECOND PHOTOCELL POSITIONED ON ONE SIDE OF SAID TRANSPARENT SUPPORT MEMBER, AN ELECTROLUMINESCENT LAMP POSITIONED ON THE OTHER SIDE OF SAID TRANSPARENT SUPPORT MEMBER, AND MEANS FOR ELECTRICALLY CONNECTING SAID FIRST PHOTOCELL IN SERIES WITH SAID ELECTROLUMINESCENT LAMP, SAID SECOND PHOTOCELL BEING IN LIGHT COUPLED RELATIONSHIP WITH SAID ELECTROLUMINESCENT LAMP, SAID SECOND PHOTOCELL BEING ADAPTED TO HAVE A LOAD CONNECTED THERETO, SAID SECOND PHOTOCELL HAVING A SUBSTANTIALLY LARGER PHOTOSENSITIVE AREA THAN SAID FIRST PHOTOCELL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |