Patent US3967033A successfully refreshed from Google Patents.
Patent US2808528A successfully refreshed from Google Patents.
US2808528A
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US
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Electron discharge device and mounting
Assignee: GTE Sylvania Inc
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Filing: 1952-11-01
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Granted: 1957-10-01
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Expires: 1972-11-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:53
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/36; Y; Y10; Y10S; Y10S439/00; Y10S439/933; Y10S439/935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048129A
Cited
US2222668A
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DE694956C
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US2419578A
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US2419757A
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US2441792A
Cited
US2459487A
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US2629066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |