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Expired European patentEurope

Preparation of cyclopropane esters

EP 0700375 B1 · Applicant: ZENECA 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 May 25, 1994 and granted December 23, 1998. A European patent lasts at most 20 years from filing, so its term ended May 25, 2014.
  • 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 25, 2019.
  • 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 25, 1994
PublishedMarch 13, 1996
GrantedDecember 23, 1998
Term endedMay 25, 2014
Application numberEP 94916300
Classification (CPC)C07C43/32 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedMay 25, 1994PublishedMarch 13, 1996Patent grantedDec 23, 1998Term endedMay 25, 2014

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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