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Expired European patentEurope

Double-flow exhaust system for an internal combustion engine

EP 1776515 B1 · Applicant: Dr. Ing. h.c. F. Porsche AG

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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 15, 2005 and granted September 19, 2012. A European patent lasts at most 20 years from filing, so its term ended March 15, 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 15, 2005
PublishedApril 25, 2007
GrantedSeptember 19, 2012
Term endedMarch 15, 2025
Application numberEP 05716061
Classification (CPC)F01N13/009 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedMarch 15, 2005PublishedApril 25, 2007Patent grantedSep 19, 2012Term endedMarch 15, 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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