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Expired European patentEurope

Magnetic recording medium

EP 0261240 B1 · Applicant: SUMITOMO METAL MINING COMPANY LIMITED

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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 June 20, 1986 and granted May 6, 1992. A European patent lasts at most 20 years from filing, so its term ended June 20, 2006.
  • 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 December 20, 2011.
  • 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.
FiledJune 20, 1986
PublishedMarch 30, 1988
GrantedMay 6, 1992
Term endedJune 20, 2006
Application numberEP 86903609
Classification (CPC)G11B5/85 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedJune 20, 1986PublishedMarch 30, 1988Patent grantedMay 6, 1992Term endedJune 20, 2006

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.