US2473969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency electron discharge device
Assignee: RCA Corp
•
Filing: 1947-03-28
•
Granted: 1949-06-21
•
Expires: 1967-03-28
Abstract
No abstract record available.
Inventors
- 👤 Nicholas E Pryslak
- 👤 Kenneth M Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:30
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023931A
Cited
US2093303A
Cited
US2262901A
Cited
US2402602A
Cited
US2353783A
Cited
US2411046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |