US3424863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light valve
Assignee: General Electric Co
•
Filing: 1964-09-29
•
Granted: 1969-01-28
•
Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 Peter D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/17; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281637A
Cited
US2169838A
Cited
US2290581A
Cited
US2335659A
Cited
US2411155A
Cited
US2481621A
Cited
US2445774A
Cited
US3218390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |