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Expired European patentEurope

Exhaust gas purifying device and exhaust gas purifying method in an internal combustion engine

EP 1734237 B1 · Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

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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 March 23, 2005 and granted May 23, 2012. A European patent lasts at most 20 years from filing, so its term ended March 23, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledMarch 23, 2005
PublishedDecember 20, 2006
GrantedMay 23, 2012
Term endedMarch 23, 2025
Application numberEP 05721334
Classification (CPC)F02B37/007 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedMarch 23, 2005PublishedDec 20, 2006Patent grantedMay 23, 2012Term endedMarch 23, 2025

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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