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Expired European patentEurope

A process for separating nitration isomers of substituted benzene compounds

EP 0155441 B1 · Applicant: Monsanto Company

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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 December 11, 1984 and granted May 17, 1989. A European patent lasts at most 20 years from filing, so its term ended December 11, 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 June 11, 2010.
  • 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.
FiledDecember 11, 1984
PublishedSeptember 25, 1985
GrantedMay 17, 1989
Term endedDecember 11, 2004
Application numberEP 84870173
Classification (CPC)C07C201/16

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedDec 11, 1984PublishedSep 25, 1985Patent grantedMay 17, 1989Term endedDec 11, 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

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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