US2707758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tube
Assignee: Unisys Corp
•
Filing: 1950-12-19
•
Granted: 1955-05-03
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 Chao C Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:11
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/029; H01J23/00; H01J23/02; H01J23/08; H01J23/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2225447A
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US2300052A
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US2305884A
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US2431077A
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US2524250A
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US2591350A
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US2632130A
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US2567674A
Cited
US2608668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |