US2679019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency electron discharge device
Assignee: RCA Corp
•
Filing: 1947-12-02
•
Granted: 1954-05-18
•
Expires: 1967-12-02
Abstract
No abstract record available.
Inventors
- 👤 Nils E Lindenblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2064469A
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US2197123A
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GB508354A
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US2304540A
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US2300052A
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US2367295A
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US2412805A
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US2508479A
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US2575383A
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US2541843A
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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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |