US2770780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical interdigital line for travelling wave tubes
Assignee: Thales SA
•
Filing: 1952-04-17
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Granted: 1956-11-13
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Expires: 1972-04-17
Abstract
No abstract record available.
Inventors
- 👤 Warnecke Robert
- 👤 Dohler Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:04
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/28; H01P; H01P9/00; H01P9/04; H03; H03H; H03H7/00; H03H7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2567748A
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US2508280A
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US2532545A
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US2432466A
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US2511407A
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US2577619A
Cited
US2566087A
Cited
US2609529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |