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Expired European patentEurope

Process for preparing 2,4-dioxo-3-azabicyclo(3.1.0)hexanes

EP 0818446 B1 · Applicant: Pfizer Limited

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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 July 1, 1997 and granted November 2, 2000. A European patent lasts at most 20 years from filing, so its term ended July 1, 2017.
  • 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 January 1, 2023.
  • 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.
FiledJuly 1, 1997
PublishedJanuary 14, 1998
GrantedNovember 2, 2000
Term endedJuly 1, 2017
Application numberEP 97304751
Classification (CPC)C07D209/52

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedJuly 1, 1997PublishedJan 14, 1998Patent grantedNov 2, 2000Term endedJuly 1, 2017

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.