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Expired European patentEurope

Oil-cooled, two-piece linked piston

EP 0154939 B1 · Applicant: Elsbett, Günter

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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 March 7, 1985 and granted December 27, 1990. A European patent lasts at most 20 years from filing, so its term ended March 7, 2005.
  • 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 September 7, 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.
FiledMarch 7, 1985
PublishedSeptember 18, 1985
GrantedDecember 27, 1990
Term endedMarch 7, 2005
Application numberEP 85102582
Classification (CPC)F02B77/11 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMarch 7, 1985PublishedSep 18, 1985Patent grantedDec 27, 1990Term endedMarch 7, 2005

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.