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US2976372A
Expired / Lapsed
US
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Magnetic tape reproducing system
Assignee: Individual
•
Filing: 1959-03-02
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Granted: 1961-03-21
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Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Sidney O Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:46
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86; Y; Y10; Y10T; Y10T83/00; Y10T83/162; Y10T83/166; Y10T83/169; Y10T83/171
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |