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Expired European patentEurope

Soot filter process and soot filter device for a diesel engine

EP 0306743 B1 · Applicant: Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V.

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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 August 19, 1988 and granted October 28, 1992. A European patent lasts at most 20 years from filing, so its term ended August 19, 2008.
  • 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 February 19, 2014.
  • 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.
FiledAugust 19, 1988
PublishedMarch 15, 1989
GrantedOctober 28, 1992
Term endedAugust 19, 2008
Application numberEP 88113462
Classification (CPC)F01N3/025

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 19, 1988PublishedMarch 15, 1989Patent grantedOct 28, 1992Term endedAug 19, 2008

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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