US2429792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording-reproducing means and system
Assignee: Brush Development Co
•
Filing: 1943-04-07
•
Granted: 1947-10-28
•
Expires: 1963-04-07
Abstract
No abstract record available.
Inventors
- 👤 Begun Semi Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:26
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; G11B5/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE591368C
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US1459202A
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US1815010A
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US2281793A
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US2272821A
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US2265831A
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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) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |