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Expired European patentEurope

Asymmetric epoxidation process using optically active manganese complexes

EP 0669339 B1 · Applicant: NISSAN CHEMICAL INDUSTRIES LTD.

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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 14, 1994 and granted May 23, 2001. A European patent lasts at most 20 years from filing, so its term ended March 14, 2014.
  • 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 14, 2019.
  • 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 14, 1994
PublishedAugust 30, 1995
GrantedMay 23, 2001
Term endedMarch 14, 2014
Application numberEP 94103924
Classification (CPC)C07D301/02 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedMarch 14, 1994PublishedAug 30, 1995Patent grantedMay 23, 2001Term endedMarch 14, 2014

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

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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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