Patent US3043974A successfully refreshed from Google Patents.
US3043974A
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US
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Electron discharge devices
Assignee: National Research Development Corp UK
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Filing: 1959-02-27
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Granted: 1962-07-10
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Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
- 👤 Mcgee James Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:31
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/503
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2135615A
Cited
US2283413A
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US2508856A
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US2374287A
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US2697181A
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US2640162A
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US2683832A
Cited
US2739244A
Cited
US2899576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |