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Expired European patentEurope

1,4-Substituted piperidines as acetylchozinesterase inhibitors and their use for the treatment of Alzheimer's disease

EP 0579263 B1 · Applicant: Eisai Co., Ltd.

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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 June 22, 1988 and granted September 16, 1998. A European patent lasts at most 20 years from filing, so its term ended June 22, 2008.
  • 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 December 22, 2013.
  • 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.
FiledJune 22, 1988
PublishedJanuary 19, 1994
GrantedSeptember 16, 1998
Term endedJune 22, 2008
Application numberEP 93113146
Classification (CPC)C07D405/06 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJune 22, 1988PublishedJan 19, 1994Patent grantedSep 16, 1998Term endedJune 22, 2008

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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