US2848645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tubes
Assignee: Unisys Corp
•
Filing: 1954-04-29
•
Granted: 1958-08-19
•
Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Warren D Mcbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:10
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2673900A
Cited
USRE23647E
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US2615141A
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US2611102A
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US2652513A
Cited
US2708727A
Cited
US2771565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |