Patent US2774006A successfully refreshed from Google Patents.
US2774006A
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US
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Travelling wave tube apparatus
Assignee: Leland Stanford Junior University
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Filing: 1950-10-14
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Granted: 1956-12-11
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Expires: 1970-10-14
Abstract
No abstract record available.
Inventors
- 👤 Lester M Field
- 👤 Stanley F Kaisel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:49
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2122538A
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US2473399A
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US2636948A
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US2501152A
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US2578434A
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US2516944A
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US2643353A
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US2645737A
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US2608668A
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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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |