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Expired European patentEurope

Process for preparing 2,6-dichloro-4-nitro-aniline

EP 0161650 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 May 11, 1985 and granted February 4, 1987. A European patent lasts at most 20 years from filing, so its term ended May 11, 2005.
  • 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 November 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.
FiledMay 11, 1985
PublishedNovember 21, 1985
GrantedFebruary 4, 1987
Term endedMay 11, 2005
Application numberEP 85105817
Classification (CPC)C07C209/74

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMay 11, 1985PublishedNov 21, 1985Patent grantedFeb 4, 1987Term endedMay 11, 2005

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.