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Expired European patentEurope

Synthesis of 3-amino-2-chloro-4-methylpyridine from acetone and ethyl cyanoacetate

EP 1070053 B1 · Applicant: BOEHRINGER INGELHEIM PHARMACEUTICALS INC.

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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 6, 2000 and granted October 26, 2005. A European patent lasts at most 20 years from filing, so its term ended January 6, 2020.
  • 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 6, 2025.
  • 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 6, 2000
PublishedJanuary 24, 2001
GrantedOctober 26, 2005
Term endedJanuary 6, 2020
Application numberEP 00903131
Classification (CPC)C07D213/73

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedJan 6, 2000PublishedJan 24, 2001Patent grantedOct 26, 2005Term endedJan 6, 2020

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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