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Expired European patentEurope

Method for preparing ethylene glycol and/or propylene glycol

EP 0226799 B1 · Applicant: MITSUI TOATSU CHEMICALS, Inc.

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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 November 12, 1986 and granted January 2, 1992. A European patent lasts at most 20 years from filing, so its term ended November 12, 2006.
  • 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 May 12, 2012.
  • 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.
FiledNovember 12, 1986
PublishedJuly 1, 1987
GrantedJanuary 2, 1992
Term endedNovember 12, 2006
Application numberEP 86115716
Classification (CPC)C07C29/106

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedNov 12, 1986PublishedJuly 1, 1987Patent grantedJan 2, 1992Term endedNov 12, 2006

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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