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Expired European patentEurope

Electroless deposition magnetic recording media process

EP 0237663 B1 · Applicant: RICHARDSON CHEMICAL COMPANY

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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 March 18, 1986 and granted September 25, 1991. A European patent lasts at most 20 years from filing, so its term ended March 18, 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 September 18, 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.
FiledMarch 18, 1986
PublishedSeptember 23, 1987
GrantedSeptember 25, 1991
Term endedMarch 18, 2006
Application numberEP 86301984
Classification (CPC)G11B5/858 +1 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 18, 1986PublishedSep 23, 1987Patent grantedSep 25, 1991Term endedMarch 18, 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

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