Patent US2081237A successfully refreshed from Google Patents.
US2777056A
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Reflex circuit for amplifying intermediate and detected video frequencies in same stage
Assignee: Standard Coil Products Co Inc
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Filing: 1954-12-02
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Granted: 1957-01-08
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Expires: 1974-12-02
Abstract
No abstract record available.
Inventors
- 👤 Richard W Bull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:37
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/548
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |