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Expired European patentEurope

Rotary internal combustion engine

EP 0828931 B1 · Applicant: Kuhn, Jean

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Overview

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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 May 30, 1996 and granted September 15, 1999. A European patent lasts at most 20 years from filing, so its term ended May 30, 2016.
  • 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 November 30, 2021.
  • 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.
FiledMay 30, 1996
PublishedMarch 18, 1998
GrantedSeptember 15, 1999
Term endedMay 30, 2016
Application numberEP 96918644
Classification (CPC)F02C5/00

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedMay 30, 1996PublishedMarch 18, 1998Patent grantedSep 15, 1999Term endedMay 30, 2016

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.