Patent Yard Sign in
Expired European patentEurope

Novel intermediates in the preparation of cyclopropylcarboxylate esters and process for their manufacture

EP 0002850 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed December 6, 1978 and granted February 17, 1982. A European patent lasts at most 20 years from filing, so its term ended December 6, 1998.
  • 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 6, 2004.
  • 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 6, 1978
PublishedJuly 11, 1979
GrantedFebruary 17, 1982
Term endedDecember 6, 1998
Application numberEP 78200351
Classification (CPC)C07C51/00 +2 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedDec 6, 1978PublishedJuly 11, 1979Patent grantedFeb 17, 1982Term endedDec 6, 1998

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.