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Expired European patentEurope

Region-selective method for preparing cyclodextrin c-6 monosulphonyl derivatives

EP 1086142 B1 · Applicant: CENTRE NATIONAL DELA RECHERCHE SCIENTIFIQUE (CNRS)

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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 25, 1999 and granted March 27, 2002. A European patent lasts at most 20 years from filing, so its term ended May 25, 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 November 25, 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.
FiledMay 25, 1999
PublishedMarch 28, 2001
GrantedMarch 27, 2002
Term endedMay 25, 2019
Application numberEP 99920913
Classification (CPC)C08B37/0012

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedMay 25, 1999PublishedMarch 28, 2001Patent grantedMarch 27, 2002Term endedMay 25, 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

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