US2894145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double modulator utilizing photo emissive material
Assignee: Individual
•
Filing: 1952-11-18
•
Granted: 1959-07-07
•
Expires: 1972-11-18
Abstract
No abstract record available.
Inventors
- 👤 Lehovec Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/36; H10; H10H; H10H20/00; H10H20/80
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |