US2825841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tubes
Assignee: Thales SA
•
Filing: 1954-02-24
•
Granted: 1958-03-04
•
Expires: 1974-02-24
Abstract
No abstract record available.
Inventors
- 👤 Convert Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:59
CPC Classifications
H; H01; H01P; H01P9/00; H01P9/02; H01J; H01J23/00; H01J23/16; H01J23/24; H01J25/00; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2578434A
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US2615141A
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US2720609A
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FR969653A
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US2687777A
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FR984020A
Cited
US2730648A
Cited
US2680823A
Cited
US2695929A
Cited
US2750529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |