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Expired European patentEurope

Chromone- and thiochromone-substituted 1,4-dihydropyridines, processes for their preparation and their use in pharmaceutical preparations

EP 0123112 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 March 16, 1984 and granted September 21, 1988. A European patent lasts at most 20 years from filing, so its term ended March 16, 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 September 16, 2009.
  • 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.
FiledMarch 16, 1984
PublishedOctober 31, 1984
GrantedSeptember 21, 1988
Term endedMarch 16, 2004
Application numberEP 84102903
Classification (CPC)C07D409/14 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMarch 16, 1984PublishedOct 31, 1984Patent grantedSep 21, 1988Term endedMarch 16, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.