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Expired European patentEurope

Exhaust gas recycling method for a combustion engine

EP 0136675 B1 · Applicant: Bayerische Motoren Werke Aktiengesellschaft

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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 September 28, 1984 and granted December 14, 1988. A European patent lasts at most 20 years from filing, so its term ended September 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 March 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.
FiledSeptember 28, 1984
PublishedApril 10, 1985
GrantedDecember 14, 1988
Term endedSeptember 28, 2004
Application numberEP 84111634
Classification (CPC)F02D21/08

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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