Patent US2489008A successfully refreshed from Google Patents.
US2489008A
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Broadcast receiving circuit and apparatus
Assignee: ThyssenKrupp Budd Co
•
Filing: 1946-02-12
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Granted: 1949-11-22
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Expires: 1966-02-12
Abstract
No abstract record available.
Inventors
- 👤 Edwin M Callender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:58
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/65; H04H20/76; H04H20/82; H04H20/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1419063A
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US1733609A
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US2338551A
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US2420933A
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US2392218A
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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) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |