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Expired European patentEurope

Method for the removal of dimethyl ether from methyl tertiary butyl ether

EP 0629601 B1 · Applicant: TEXACO CHEMICAL 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 June 1, 1994 and granted November 27, 1996. A European patent lasts at most 20 years from filing, so its term ended June 1, 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 December 1, 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.
FiledJune 1, 1994
PublishedDecember 21, 1994
GrantedNovember 27, 1996
Term endedJune 1, 2014
Application numberEP 94303947
Classification (CPC)C07C41/34 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 1, 1994PublishedDec 21, 1994Patent grantedNov 27, 1996Term endedJune 1, 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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