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Expired European patentEurope

Process for the preparation of sulphonated distyryl-biphenyl compounds

EP 1064258 B1 · Applicant: Ciba Specialty Chemicals Holding Inc.

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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 16, 1999 and granted January 14, 2004. A European patent lasts at most 20 years from filing, so its term ended March 16, 2019.
  • 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 16, 2024.
  • 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 16, 1999
PublishedJanuary 3, 2001
GrantedJanuary 14, 2004
Term endedMarch 16, 2019
Application numberEP 99910345
Classification (CPC)C07C303/32 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedMarch 16, 1999PublishedJan 3, 2001Patent grantedJan 14, 2004Term endedMarch 16, 2019

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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