US3020439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High efficiency traveling wave tubes
Assignee: RCA Corp
•
Filing: 1958-07-30
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Granted: 1962-02-06
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Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Arie L Eichenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:59
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)
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US2610308A
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GB660660A
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US2652513A
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US2653271A
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US2807742A
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US2888596A
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US2880353A
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US2825841A
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US2843776A
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |