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Expired European patentEurope

Method for prediction of cetane numbers of gasoils

EP 0671003 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

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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 October 12, 1993 and granted January 29, 1997. A European patent lasts at most 20 years from filing, so its term ended October 12, 2013.
  • 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 April 12, 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.
FiledOctober 12, 1993
PublishedSeptember 13, 1995
GrantedJanuary 29, 1997
Term endedOctober 12, 2013
Application numberEP 93922561
Classification (CPC)G01N33/2829 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedOct 12, 1993PublishedSep 13, 1995Patent grantedJan 29, 1997Term endedOct 12, 2013

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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