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Expired European patentEurope

Process for preparing light-coloured oleic acid sulfonates

EP 0486582 B1 · Applicant: Henkel Kommanditgesellschaft auf Aktien

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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 July 31, 1990 and granted October 18, 1995. A European patent lasts at most 20 years from filing, so its term ended July 31, 2010.
  • 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 January 31, 2016.
  • 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.
FiledJuly 31, 1990
PublishedMay 27, 1992
GrantedOctober 18, 1995
Term endedJuly 31, 2010
Application numberEP 90912433
Classification (CPC)C07C303/02 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedJuly 31, 1990PublishedMay 27, 1992Patent grantedOct 18, 1995Term endedJuly 31, 2010

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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