Patent Yard Sign in
Expired European patentEurope

Synthesis of ethyl t-butyl ether from t-butanol using b-zeolite and multimetal-modified b-zeolite catalysts

EP 0624564 B1 · Applicant: TEXACO CHEMICAL INC.

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 April 19, 1994 and granted November 20, 1996. A European patent lasts at most 20 years from filing, so its term ended April 19, 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 October 19, 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.
FiledApril 19, 1994
PublishedNovember 17, 1994
GrantedNovember 20, 1996
Term endedApril 19, 2014
Application numberEP 94302759
Classification (CPC)C07C41/09

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedApril 19, 1994PublishedNov 17, 1994Patent grantedNov 20, 1996Term endedApril 19, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.