US2646500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency tuner
Assignee: RCA Corp
•
Filing: 1947-03-15
•
Granted: 1953-07-21
•
Expires: 1967-03-15
Abstract
No abstract record available.
Inventors
- 👤 Robert F Romero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:27
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2213328A
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US2250829A
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US2296107A
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US2341346A
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US2413451A
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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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |