US2491480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency tunable circuit
Assignee: Individual
•
Filing: 1945-05-21
•
Granted: 1949-12-20
•
Expires: 1965-05-21
Abstract
No abstract record available.
Inventors
- 👤 Davis Thomas Mcl
- 👤 Toth Emerick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:13
CPC Classifications
H; H03; H03H; H03H5/00; H03H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153205A
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US2194696A
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US2277638A
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GB548063A
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US2366750A
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US2367681A
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US2438784A
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US2413451A
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US2422454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |