US2777968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning mechanism for microwave resonator electron tubes
Assignee: Unisys Corp
•
Filing: 1952-07-14
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Granted: 1957-01-15
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Expires: 1972-07-14
Abstract
No abstract record available.
Inventors
- 👤 David E Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:51
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/20; H01J23/207; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454306A
Cited
US2304186A
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US2380946A
Cited
US2439387A
Cited
US2414785A
Cited
US2466058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |