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Expired European patentEurope

Process for preparing rimantadine

EP 0162444 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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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 May 21, 1985 and granted March 28, 1990. A European patent lasts at most 20 years from filing, so its term ended May 21, 2005.
  • 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 November 21, 2010.
  • 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.
FiledMay 21, 1985
PublishedNovember 27, 1985
GrantedMarch 28, 1990
Term endedMay 21, 2005
Application numberEP 85106207
Classification (CPC)C07C209/40

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMay 21, 1985PublishedNov 27, 1985Patent grantedMarch 28, 1990Term endedMay 21, 2005

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.