Patent US2955224A successfully refreshed from Google Patents.
US2955224A
Expired / Lapsed
US
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Traveling wave electron discharge device
Assignee: TDK Micronas GmbH
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Filing: 1958-01-16
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Granted: 1960-10-04
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Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Marchese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:29
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2578434A
Cited
US2712614A
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US2789246A
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US2803777A
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US2849651A
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US2727179A
Cited
US2848645A
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FR1139162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |