Patent Yard Sign in
Expired European patentEurope

A method of producing and separating durene

EP 0146658 B1 · Applicant: MOBIL OIL CORPORATION

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 29, 1983 and granted April 4, 1990. A European patent lasts at most 20 years from filing, so its term ended December 29, 2003.
  • 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 29, 2009.
  • 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 29, 1983
PublishedJuly 3, 1985
GrantedApril 4, 1990
Term endedDecember 29, 2003
Application numberEP 83308026
Classification (CPC)C10G31/06 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 29, 1983PublishedJuly 3, 1985Patent grantedApril 4, 1990Term endedDec 29, 2003

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.