Patent EP0356112A1 successfully refreshed from Google Patents.
US2665339A
Expired / Lapsed
US
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High and very high frequency tunable circuits
Assignee: Patelhold Patenverwertungs and Elektro-Holding AG
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Filing: 1948-11-18
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Granted: 1954-01-05
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Expires: 1968-11-18
Abstract
No abstract record available.
Inventors
- 👤 Leng Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:24
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/02; H03; H03F; H03F3/00; H03F3/54; H03J; H03J5/00; H03J5/24; H03J5/242; H04; H04B; H04B1/00; H04B1/02; H04B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2085403A
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US2262365A
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US2260164A
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US2405229A
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US2421784A
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US2544832A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |