US2602157A
Expired / Lapsed
US
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Ultrahigh-frequency variable impedance element
Assignee: Unisys Corp
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Filing: 1946-05-31
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Granted: 1952-07-01
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Expires: 1966-05-31
Abstract
No abstract record available.
Inventors
- 👤 Donald R Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:43
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2278210A
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US2414785A
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US2482768A
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US2438768A
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US2485029A
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US2512980A
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US2453453A
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US2500637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |