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Expired European patentEurope

Method for operating a combustion chamber having a swirling motion

EP 0146571 B1 · Applicant: INTER POWER TECHNOLOGIE GmbH

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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 29, 1984 and granted March 15, 1989. A European patent lasts at most 20 years from filing, so its term ended May 29, 2004.
  • 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 29, 2009.
  • 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 29, 1984
PublishedJuly 3, 1985
GrantedMarch 15, 1989
Term endedMay 29, 2004
Application numberEP 84901978
Classification (CPC)F23C10/22 +1 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMay 29, 1984PublishedJuly 3, 1985Patent grantedMarch 15, 1989Term endedMay 29, 2004

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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