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Expired European patentEurope

Water soluble, fibre-reactive dyes, process for manufacturing them and their use

EP 0474654 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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 12, 1990 and granted October 26, 1994. A European patent lasts at most 20 years from filing, so its term ended May 12, 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 November 12, 2015.
  • 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 12, 1990
PublishedMarch 18, 1992
GrantedOctober 26, 1994
Term endedMay 12, 2010
Application numberEP 90906981
Classification (CPC)C09B62/4411

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMay 12, 1990PublishedMarch 18, 1992Patent grantedOct 26, 1994Term endedMay 12, 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

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