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Expired European patentEurope

Fuel composition and additive concentrates, and their use in inhibiting engine coking

EP 0247706 B1 · Applicant: ETHYL CORPORATION

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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 28, 1984 and granted June 14, 1989. A European patent lasts at most 20 years from filing, so its term ended December 28, 2004.
  • 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 28, 2010.
  • 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 28, 1984
PublishedDecember 2, 1987
GrantedJune 14, 1989
Term endedDecember 28, 2004
Application numberEP 87201460
Classification (CPC)C10L10/02 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedDec 28, 1984PublishedDec 2, 1987Patent grantedJune 14, 1989Term endedDec 28, 2004

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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