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US2641708A
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Variable resonant structure
Assignee: RCA Corp
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Filing: 1950-03-29
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Granted: 1953-06-09
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Expires: 1970-03-29
Abstract
No abstract record available.
Inventors
- 👤 Wendell L Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:44
CPC Classifications
H; H03; H03H; H03H5/00; H03H5/02; H01; H01F; H01F21/00; H01F21/02; H01F21/06; H01F21/065; H01P; H01P7/00; H01P7/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB439147A
Cited
GB561787A
Cited
US2390009A
Cited
US2394391A
Cited
US2414280A
Cited
US2518930A
Cited
US2562263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |