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Expired European patentEurope

Process for enhancing the optical purity of 2r- 1-hydroxy- 1-trifluoromethyl- 3-cyclopropylpropyn-2yl] -4-chloroaniline

EP 1017666 B1 · Applicant: MERCK & CO., 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 September 1, 1998 and granted November 5, 2003. A European patent lasts at most 20 years from filing, so its term ended September 1, 2018.
  • 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 March 1, 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.
FiledSeptember 1, 1998
PublishedJuly 12, 2000
GrantedNovember 5, 2003
Term endedSeptember 1, 2018
Application numberEP 98942339
Classification (CPC)C07C213/10

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedSep 1, 1998PublishedJuly 12, 2000Patent grantedNov 5, 2003Term endedSep 1, 2018

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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