US2638561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray oscillator tube
Assignee: RCA Corp
•
Filing: 1946-10-30
•
Granted: 1953-05-12
•
Expires: 1966-10-30
Abstract
No abstract record available.
Inventors
- 👤 George C Sziklai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:26
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H01J25/00; H01J25/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2096460A
Cited
US2232050A
Cited
GB508354A
Cited
US2272165A
Cited
US2214729A
Cited
US2409222A
Cited
US2390250A
Cited
US2413276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |