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US2456770A
Expired / Lapsed
US
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Impedance matching device
Assignee: RCA Corp
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Filing: 1944-02-14
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Granted: 1948-12-21
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Expires: 1964-02-14
Abstract
No abstract record available.
Inventors
- 👤 John B Dearing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/24; H01P1/26; H01P1/266; H01Q; H01Q1/00; H01Q1/44; H01Q1/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2171219A
Cited
US2236004A
Cited
US2276743A
Cited
US2294881A
Cited
US2306282A
Cited
US2349440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |