US2840754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam tube
Assignee: RCA Corp
•
Filing: 1954-09-01
•
Granted: 1958-06-24
•
Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:33
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227033A
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US2075717A
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US2103645A
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US2124270A
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GB501058A
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GB572540A
Cited
GB580860A
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US2582045A
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US2590100A
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US2567674A
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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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |