Patent US3677024A successfully refreshed from Google Patents.
US2283545A
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Light modulating method and apparatus
Assignee: Individual
•
Filing: 1940-07-20
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Granted: 1942-05-19
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Expires: 1960-07-20
Abstract
No abstract record available.
Inventors
- 👤 Jr John Presper Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:26
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/66; G; G02; G02F; G02F1/00; G02F1/01; G02F1/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-05-18 | 1945-11-17 | 1946-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-05-18 | 1949-11-17 | 1950-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-05-18 | 1953-11-17 | 1954-05-19 | $7700.00 | Window Closed / Lapsed |