Patent US2698398A successfully refreshed from Google Patents.
US2698398A
Expired / Lapsed
US
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Traveling wave electron discharge device
Assignee: Leland Stanford Junior University
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Filing: 1949-04-07
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Granted: 1954-12-28
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Expires: 1969-04-07
Abstract
No abstract record available.
Inventors
- 👤 Edward L Ginzton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2109843A
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US2122538A
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US2368031A
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US2402184A
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US2450026A
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US2420342A
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US2512980A
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US2457524A
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US2509374A
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US2559581A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |