US2525806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant circuit
Assignee: Individual
•
Filing: 1943-06-04
•
Granted: 1950-10-17
•
Expires: 1963-06-04
Abstract
No abstract record available.
Inventors
- 👤 Kumpfer Beverly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:54
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H01; H01P; H01P7/00; H01P7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2167201A
Cited
US2463519A
Cited
US2284405A
Cited
US2409608A
Cited
US2412997A
Cited
US2427693A
Cited
US2404261A
Cited
US2446829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |