Patent US2483889A successfully refreshed from Google Patents.
US2483889A
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Superheterodyne receiver with automatic frequency control
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-04-12
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Granted: 1949-10-04
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Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Groot Folkert Albert De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:46
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/042; H03J7/14; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/30; H04B1/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |