Patent US2662170A successfully refreshed from Google Patents.
US2662170A
Expired / Lapsed
US
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Radio receiving circuit with automatic volume control and noise suppressing means
Assignee: Hartford National Bank and Trust Co
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Filing: 1949-07-26
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Granted: 1953-12-08
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Expires: 1969-07-26
Abstract
No abstract record available.
Inventors
- 👤 Boelens Willem Wigger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:24
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1978182A
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US2214608A
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US2259520A
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US2253338A
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US2316851A
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US2363649A
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US2472301A
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US2395770A
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US2427691A
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US2477391A
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US2498839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |