US2823333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tube
Assignee: AT&T Inc
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Filing: 1954-10-29
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Granted: 1958-02-11
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Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
- 👤 Calvin F Quate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:04
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/52; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/181; H01P5/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |