US2863085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tube structure
Assignee: AT&T Inc
•
Filing: 1952-12-11
•
Granted: 1958-12-02
•
Expires: 1972-12-11
Abstract
No abstract record available.
Inventors
- 👤 Sloan D Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:29
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50; H01J23/16; H01J23/24; H01J23/26; H01J23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2452032A
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US2615143A
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US2602148A
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US2611101A
Cited
US2578434A
Cited
US2720609A
Cited
GB664663A
Cited
US2636148A
Cited
US2771565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |