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Expired European patentEurope

Process for the separation of isomers of substituted cyclopropanecarboxylic acids

EP 0119463 B1 · Applicant: CHINOIN Gyogyszer és Vegyészeti Termékek Gyára RT.

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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 February 14, 1984 and granted September 23, 1987. A European patent lasts at most 20 years from filing, so its term ended February 14, 2004.
  • 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 August 14, 2009.
  • 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.
FiledFebruary 14, 1984
PublishedSeptember 26, 1984
GrantedSeptember 23, 1987
Term endedFebruary 14, 2004
Application numberEP 84101504
Classification (CPC)C07C51/487

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedFeb 14, 1984PublishedSep 26, 1984Patent grantedSep 23, 1987Term endedFeb 14, 2004

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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