Patent US2855508A successfully refreshed from Google Patents.
US2855508A
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Dual frequency resonant circuits
Assignee: RCA Corp
•
Filing: 1954-03-22
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Granted: 1958-10-07
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Expires: 1974-03-22
Abstract
No abstract record available.
Inventors
- 👤 Barlow Niles Linden
- 👤 Neumann Karl Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
H; 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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US1627767A
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US1706030A
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US1836594A
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US1851905A
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US1812624A
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US2151814A
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US2154692A
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US2189063A
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US2312761A
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US2668198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |