US2725537A
Expired / Lapsed
US
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Adjustable ultra-high-frequency impedance device
Assignee: Individual
•
Filing: 1953-12-28
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Granted: 1955-11-29
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Expires: 1973-12-28
Abstract
No abstract record available.
Inventors
- 👤 Wilmer L Barrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:20
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; G; G01; G01R; G01R17/00; G01R17/10; G01R17/105; G01R27/00; G01R27/02; H01P1/00; H01P1/24; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/8085; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/86815; Y10T137/86823
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |