Patent US1969187A successfully refreshed from Google Patents.
US2629861A
Expired / Lapsed
US
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Control circuit for signal recording and reproducing systems
Assignee: Brush Development Co
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Filing: 1947-10-11
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Granted: 1953-02-24
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Expires: 1967-10-11
Abstract
No abstract record available.
Inventors
- 👤 Begun Semi Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:22
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/36; G01; G01B; G01B7/00; G01B7/02; G01B7/04; G01B7/042; G01B7/046; G11B20/00; G11B20/02; G11B20/025; G11B5/00; G11B5/008; G11B5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2385701A
Cited
US2338766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |