Patent Yard Sign in
Expired European patentEurope

Isoindoline dyes and their use

EP 0088920 B1 · Applicant: BASF Aktiengesellschaft

EPO PDF

Overview

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

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed February 25, 1983 and granted January 15, 1986. A European patent lasts at most 20 years from filing, so its term ended February 25, 2003.
  • 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 25, 2008.
  • 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 25, 1983
PublishedSeptember 21, 1983
GrantedJanuary 15, 1986
Term endedFebruary 25, 2003
Application numberEP 83101840
Classification (CPC)C09B57/04

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedFeb 25, 1983PublishedSep 21, 1983Patent grantedJan 15, 1986Term endedFeb 25, 2003

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.