Patent US2926281A successfully refreshed from Google Patents.
US2926281A
Expired / Lapsed
US
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Traveling wave tube
Assignee: AT&T Inc
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Filing: 1956-05-31
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Granted: 1960-02-23
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Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ashkin Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:38
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735033A
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US2801362A
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US2623193A
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US2652513A
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US2694159A
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US2757311A
Cited
US2683238A
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FR1106301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |