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Expired European patentEurope

A helically-shaped intake port of an internal combustion engine

EP 0094084 B1 · Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

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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 10, 1983 and granted October 1, 1986. A European patent lasts at most 20 years from filing, so its term ended May 10, 2003.
  • 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 10, 2008.
  • 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 10, 1983
PublishedNovember 16, 1983
GrantedOctober 1, 1986
Term endedMay 10, 2003
Application numberEP 83104597
Classification (CPC)F02B31/042

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMay 10, 1983PublishedNov 16, 1983Patent grantedOct 1, 1986Term endedMay 10, 2003

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.