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Expired European patentEurope

Aromatic compounds

EP 0249950 B1 · Applicant: THE WELLCOME FOUNDATION 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 February 3, 1983 and granted June 19, 1991. A European patent lasts at most 20 years from filing, so its term ended February 3, 2003.
  • 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 August 3, 2008.
  • 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.
FiledFebruary 3, 1983
PublishedDecember 23, 1987
GrantedJune 19, 1991
Term endedFebruary 3, 2003
Application numberEP 87108671
Classification (CPC)C07D405/04 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedFeb 3, 1983PublishedDec 23, 1987Patent grantedJune 19, 1991Term endedFeb 3, 2003

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.