US2806973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave electron discharge device
Assignee: TDK Micronas GmbH
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Filing: 1955-12-30
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Granted: 1957-09-17
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Alexander W Mcewan
- 👤 Charles E Anderson
- 👤 Carl V Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:44
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38; H01J23/00; H01J23/16; H01J23/24; H01J23/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2477122A
Cited
US2653270A
Cited
US2444080A
Cited
US2463416A
Cited
US2602148A
Cited
US2692351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |