Patent US2640901A successfully refreshed from Google Patents.
US2640901A
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Photoelectric semiconductor device
Assignee: General Electric Co
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Filing: 1951-05-28
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Granted: 1953-06-02
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Expires: 1971-05-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Kinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:16
CPC Classifications
H; H10; H10F; H10F30/00; H10F30/20; F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/18; H03; H03F; H03F17/00; H10F99/00
Claims Analysis
Total Claims: 0
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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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |