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Expired European patentEurope

Benzofuranyl-benzimidazoles, process for their preparation and their use in the optical bleaching of organic materials

EP 0011824 B1 · Applicant: BAYER AG

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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 November 22, 1979 and granted October 14, 1981. A European patent lasts at most 20 years from filing, so its term ended November 22, 1999.
  • 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 May 22, 2005.
  • 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.
FiledNovember 22, 1979
PublishedJune 11, 1980
GrantedOctober 14, 1981
Term endedNovember 22, 1999
Application numberEP 79104642
Classification (CPC)C07D307/85

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedNov 22, 1979PublishedJune 11, 1980Patent grantedOct 14, 1981Term endedNov 22, 1999

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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