US2669609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: RCA Corp
•
Filing: 1948-10-30
•
Granted: 1954-02-16
•
Expires: 1968-10-30
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:05
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/30; H01J17/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US770233A
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US1145735A
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US1299356A
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US1534148A
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US1466777A
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US1618499A
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US1748386A
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GB332734A
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US2304412A
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US2531144A
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US2479271A
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US2520603A
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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) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |