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US3437865A
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Thermionic electron emitter having a porous refractory metal matrix and an alloy of active metal and mobilizer metal therein
Assignee: National Research Development Corp UK
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Filing: 1965-12-13
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Granted: 1969-04-08
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Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Dennis Gabor
- 👤 Michael Joseph Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:27
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J1/00; H01J1/02; H01J1/13; H01J1/14; H01J45/00; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2808530A
Cited
US2808531A
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US2925514A
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US3159461A
Cited
US2945150A
Cited
US3155864A
Cited
US3139541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |