US2813221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam traveling-wave tube
Assignee: RCA Corp
•
Filing: 1950-10-02
•
Granted: 1957-11-12
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Rolf W Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:16
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1688991A
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US1879470A
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US1991282A
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US2241976A
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US2300052A
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US2575383A
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US2602148A
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US2541843A
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US2588831A
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US2654047A
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US2584597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |