Patent US2807742A successfully refreshed from Google Patents.
US2807742A
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Traveling wave tube
Assignee: International Standard Electric Corp
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Filing: 1954-05-27
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Granted: 1957-09-24
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Kenmoku Masamichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:10
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38; H01J23/00; H01J23/02; H01J23/06; H01J23/065; H01J23/08; H01J23/083; H01J23/087; H01J23/0876; H01J23/16; H01J23/24; H01J23/26; H01J23/30; H01J23/36; H01J23/40; H01J23/42; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |