US2465211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device for high frequencies
Assignee: RCA Corp
•
Filing: 1944-03-08
•
Granted: 1949-03-22
•
Expires: 1964-03-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John S Donal
- 👤 Cuccia Carmen Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:35
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/22; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB449920A
Cited
GB509102A
Cited
US2238272A
Cited
US2187149A
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US2408236A
Cited
US2408235A
Cited
US2412824A
Cited
US2406277A
Cited
US2404212A
Cited
US2408238A
Cited
US2408903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |