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Expired European patentEurope

Bleaching agent additive

EP 0317921 B1 · Applicant: SÜD-CHEMIE AG

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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 November 19, 1988 and granted September 16, 1992. A European patent lasts at most 20 years from filing, so its term ended November 19, 2008.
  • 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 May 19, 2014.
  • 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.
FiledNovember 19, 1988
PublishedMay 31, 1989
GrantedSeptember 16, 1992
Term endedNovember 19, 2008
Application numberEP 88119265
Classification (CPC)D21C9/163

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedNov 19, 1988PublishedMay 31, 1989Patent grantedSep 16, 1992Term endedNov 19, 2008

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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