Patent US2882438A successfully refreshed from Google Patents.
US2882438A
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Traveling wave tube
Assignee: AT&T Inc
•
Filing: 1954-04-12
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Granted: 1959-04-14
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Expires: 1974-04-12
Abstract
No abstract record available.
Inventors
- 👤 Karp Arthur
- 👤 Willis H Yocom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:31
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/40; H01J23/00; H01J23/16; H01J23/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USRE23647E
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US2687777A
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US2683238A
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US2590511A
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US2768322A
Cited
US2745984A
Cited
US2812468A
Cited
US2820170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |