US2448527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold cathode electron discharge device and circuits therefor
Assignee: RCA Corp
•
Filing: 1944-09-08
•
Granted: 1948-09-07
•
Expires: 1964-09-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Hansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:26
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2103362A
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US2071515A
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US2159521A
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US2166210A
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US2244318A
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US2211091A
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US2211404A
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US2408236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |