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Expired European patentEurope

Use of di(alkylphenoxy) methanes as isolating oils, and di(alkylphenoxy) methane which can be used for this application

EP 0054488 B1 · Applicant: COMPAGNIE FRANCAISE DE RAFFINAGE Société anonyme dite:

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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 December 11, 1981 and granted February 15, 1984. A European patent lasts at most 20 years from filing, so its term ended December 11, 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 June 11, 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.
FiledDecember 11, 1981
PublishedJune 23, 1982
GrantedFebruary 15, 1984
Term endedDecember 11, 2001
Application numberEP 81401981
Classification (CPC)C07C43/30 +2 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedDec 11, 1981PublishedJune 23, 1982Patent grantedFeb 15, 1984Term endedDec 11, 2001

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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