US4568988B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4568988B1 - - Google Patents
Assignee: QED INTELLECTUAL PROPERTY SERVICES Ltd
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Filing: 1984-02-22
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Granted: 1988-11-29
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Expires: 2004-02-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:47
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012; G11B25/00; G11B25/04; G11B25/043; G11B33/00; G11B33/14; G11B5/48; G11B5/54; G11B5/55; G11B5/5521
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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |