Patent US2470426A successfully refreshed from Google Patents.
US2470426A
Expired / Lapsed
US
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Spread band tuning circuit
Assignee: Zenith Electronics LLC
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Filing: 1945-08-22
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Granted: 1949-05-17
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Expires: 1965-08-22
Abstract
No abstract record available.
Inventors
- 👤 Benin Zoimon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:45
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06; H03; H03J; H03J3/00; H03J3/02; H03J3/10
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) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |