US2943206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron image intensifying devices
Assignee: National Research Development Corp UK
•
Filing: 1957-02-21
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Granted: 1960-06-28
•
Expires: 1977-02-21
Abstract
No abstract record available.
Inventors
- 👤 Mcgee James Dwyer
- 👤 Evans Hugh Devereux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:42
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/023; H01J29/10; H01J29/36; H01J29/38; H01J29/385; H01J31/00; H01J31/08; H01J31/50; H01J31/506
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2196691A
Cited
US2234801A
Cited
US2666856A
Cited
USRE23802E
Cited
US2612610A
Cited
US2821637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |