US3499157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light intensity amplifying device utilizing a semiconductor electron-sensitive variable resistance layer
Assignee: NEC Corp
•
Filing: 1965-08-12
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Granted: 1970-03-03
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Kimihiko Satake
- 👤 Hiromitsu Shiraki
- 👤 Masayoshi Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0333; H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J2231/00; H01J2231/50; H01J2231/50005; H01J2231/5001; H01J2231/50015; H01J2231/505; H01J2231/5056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2277007A
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US2276360A
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US2297443A
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US2411155A
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US2640162A
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US3247389A
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US2892380A
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US2983824A
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US3015693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |