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Expired European patentEurope

Continuous-plus embedded data position control method for magnetic disk device

EP 0262690 B1 · Applicant: DIGITAL EQUIPMENT CORPORATION

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed May 6, 1983 and granted December 1, 1993. A European patent lasts at most 20 years from filing, so its term ended May 6, 2003.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by November 6, 2008.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMay 6, 1983
PublishedApril 6, 1988
GrantedDecember 1, 1993
Term endedMay 6, 2003
Application numberEP 87114637
Classification (CPC)G11B5/5965

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMay 6, 1983PublishedApril 6, 1988Patent grantedDec 1, 1993Term endedMay 6, 2003

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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