Patent US3432223A successfully refreshed from Google Patents.
US3432223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulator for a light beam
Assignee: NEC Corp
•
Filing: 1964-04-01
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Granted: 1969-03-11
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Teiji Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0305; G02F1/0311
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2467325A
Cited
US2788710A
Cited
US3243724A
Cited
US3356438A
Cited
US3284632A
Cited
US3329474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |