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Patent US3402313A successfully refreshed from Google Patents.
US3402313A
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Thermionic generator having auxiliary anodes in the main discharge space
Assignee: National Research Development Corp UK
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Filing: 1965-05-10
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Granted: 1968-09-17
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Gabor Dennis
- 👤 Nilson John Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:40
CPC Classifications
H; H01; H01J; H01J45/00; H02; H02N; H02N3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE29854C
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US2239694A
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US2607016A
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US2697800A
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US2959704A
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US3021472A
Cited
US3112863A
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US3238395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |