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Expired European patentEurope

Nitrogen containing heterocycles

EP 0152808 B1 · Applicant: MERCK PATENT GmbH

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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 January 26, 1985 and granted September 12, 1990. A European patent lasts at most 20 years from filing, so its term ended January 26, 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 July 26, 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.
FiledJanuary 26, 1985
PublishedAugust 28, 1985
GrantedSeptember 12, 1990
Term endedJanuary 26, 2005
Application numberEP 85100809
Classification (CPC)C07D239/26 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJan 26, 1985PublishedAug 28, 1985Patent grantedSep 12, 1990Term endedJan 26, 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

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