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Expired European patentEurope

Pyrazole derivative, process thereof and herbicide containing the derivative as an effective component

EP 0284030 B1 · Applicant: Otsuka Kagaku Kabushiki Kaisha

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Overview

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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 22, 1988 and granted March 17, 1993. A European patent lasts at most 20 years from filing, so its term ended March 22, 2008.
  • 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 22, 2013.
  • 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 22, 1988
PublishedSeptember 28, 1988
GrantedMarch 17, 1993
Term endedMarch 22, 2008
Application numberEP 88104584
Classification (CPC)C07D401/04 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMarch 22, 1988PublishedSep 28, 1988Patent grantedMarch 17, 1993Term endedMarch 22, 2008

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.