US2933637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling wave tube
Assignee: Telefunken AG
•
Filing: 1954-05-25
•
Granted: 1960-04-19
•
Expires: 1974-05-25
Abstract
No abstract record available.
Inventors
- 👤 Bruck Lothar
- 👤 Lauer Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:55
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2636948A
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USRE23647E
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US2669674A
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US2643353A
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US2645737A
Cited
US2828440A
Cited
US2798981A
Cited
US2811673A
Cited
US2822492A
Cited
US2788464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |