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Expired European patentEurope

A process for the production of tertiary olefin

EP 0045159 B1 · Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

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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 July 15, 1981 and granted October 19, 1983. A European patent lasts at most 20 years from filing, so its term ended July 15, 2001.
  • 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 January 15, 2007.
  • 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.
FiledJuly 15, 1981
PublishedFebruary 3, 1982
GrantedOctober 19, 1983
Term endedJuly 15, 2001
Application numberEP 81303251
Classification (CPC)C07C1/20 +1 more

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

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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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