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Expired European patentEurope

Process and polycondensation plant for processing impure ethylene glycol

EP 0686166 B1 · Applicant: JOHN BROWN DEUTSCHE ENGINEERING GmbH

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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 February 25, 1994 and granted May 7, 1997. A European patent lasts at most 20 years from filing, so its term ended February 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 August 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.
FiledFebruary 25, 1994
PublishedDecember 13, 1995
GrantedMay 7, 1997
Term endedFebruary 25, 2014
Application numberEP 94910319
Classification (CPC)C08G63/78

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedFeb 25, 1994PublishedDec 13, 1995Patent grantedMay 7, 1997Term endedFeb 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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