US2615141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency electron discharge tube of the traveling wave type
Assignee: RCA Corp
•
Filing: 1947-11-20
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Granted: 1952-10-21
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Expires: 1967-11-20
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Hansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:51
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2064469A
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US2122538A
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US2289756A
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US2300052A
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US2367295A
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US2578434A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |