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Expired European patentEurope

Antiviral purine derivatives and process for their preparation

EP 0242482 B1 · Applicant: BEECHAM GROUP PLC

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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 December 11, 1986 and granted September 6, 1995. A European patent lasts at most 20 years from filing, so its term ended December 11, 2006.
  • 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 June 11, 2012.
  • 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.
FiledDecember 11, 1986
PublishedOctober 28, 1987
GrantedSeptember 6, 1995
Term endedDecember 11, 2006
Application numberEP 86309667
Classification (CPC)C07D473/16 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 11, 1986PublishedOct 28, 1987Patent grantedSep 6, 1995Term endedDec 11, 2006

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.