Patent US4070061A successfully refreshed from Google Patents.
Patent US4224645B1 successfully refreshed from Google Patents.
US4224645B1
Expired / Lapsed
US
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Method and apparatus for controlling the movement of a recording medium
Assignee: Ampex Corp
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Filing: 1978-02-03
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Granted: 1999-08-03
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Expires: 1998-02-03
Abstract
No abstract record available.
Inventors
- 👤 Paul A Mauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:33
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/54; G11B15/1808; G11B15/60; G11B15/602; G11B27/00; G11B27/005; G11B27/10; G11B27/11; G11B27/13; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-02 | 2003-02-01 | 2003-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-02 | 2007-02-01 | 2007-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-02 | 2011-02-01 | 2011-08-03 | $7700.00 | Window Closed / Lapsed |