Patent US2740875A successfully refreshed from Google Patents.
US2740875A
Expired / Lapsed
US
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Photoelectric device
Assignee: General Electric Co
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Filing: 1952-10-02
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Granted: 1956-04-03
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Expires: 1972-10-02
Abstract
No abstract record available.
Inventors
- 👤 George E Imman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:33
CPC Classifications
H; H10; H10F; H10F30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PHOTOELECTRIC DEVICE COMPRISING A HERMETICALLY SEALED VITREOUS BULB, A PAIR OF LEAD WIRES SEALED INTO SAID BULD, A PHOTO-CONDUCTIVE CRYSTAL SUPPORTED WITHIN SAID BULB ON THE ENDS OF SAID LEAD-IN WIRES, THE ENDS OF SAID WIRES BEING FORMED INTO ARCUATE CLAMPS RECEIVING THE ENDS OF SAID CRYSTAL, SAID LEAD WIRES BEING STRESSED TO SPRING INWARDLY TOWARD EACH OTHER TO ASSIST IN MAINTAINING THE ENDS OF THE CRYSTAL WITHIN THE CLAMPS.
Claim 2
Dependent Claim
71 words
A PHOTOELECTRIC DEVICE COMPRISING A HERMETICALLY SEALED VITREOUS BULB, A PAIR OF LEAD WIRES SEALED INTO SAID BULD, A PHOTO-CONDUCTIVE CRYSTAL SUPPORTED WITHIN SAID BULB ON THE ENDS OF SAID LEAD-IN WIRES, THE ENDS OF SAID WIRES BEING FORMED INTO ARCUATE CLAMPS RECEIVING THE ENDS OF SAID CRYSTAL, SAID LEAD WIRES BEING STRESSED TO SPRING INWARDLY TOWARD EACH OTHER TO ASSIST IN MAINTAINING THE ENDS OF THE CRYSTAL WITHIN THE CLAMPS.
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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |