US2824257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tube
Assignee: General Electric Co
•
Filing: 1953-03-03
•
Granted: 1958-02-18
•
Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Garland M Branch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:39
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)
US2489082A
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US2584308A
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US2679019A
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FR987303A
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US2707759A
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FR993156A
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GB668017A
Cited
US2725499A
Cited
US2588832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |