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Expired European patentEurope

Use of a catalyst comprising a zeolite, a noble metal of the platinum group and an additional metal in the aromatisation of hydrocarbons with 2 to 4 carbon atoms

EP 0457640 B1 · Applicant: INSTITUT FRANCAIS DU PETROLE

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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 April 29, 1991 and granted January 12, 1994. A European patent lasts at most 20 years from filing, so its term ended April 29, 2011.
  • 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 29, 2016.
  • 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 29, 1991
PublishedNovember 21, 1991
GrantedJanuary 12, 1994
Term endedApril 29, 2011
Application numberEP 91401155
Classification (CPC)C07C2/00

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedApril 29, 1991PublishedNov 21, 1991Patent grantedJan 12, 1994Term endedApril 29, 2011

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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