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Expired European patentEurope

Variable diffuser device in a centrifugal compressor

EP 0058533 B1 · Applicant: MITSUBISHI JUKOGYO 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 February 12, 1982 and granted July 17, 1985. A European patent lasts at most 20 years from filing, so its term ended February 12, 2002.
  • 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 August 12, 2007.
  • 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.
FiledFebruary 12, 1982
PublishedAugust 25, 1982
GrantedJuly 17, 1985
Term endedFebruary 12, 2002
Application numberEP 82300700
Classification (CPC)F04D29/462

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedFeb 12, 1982PublishedAug 25, 1982Patent grantedJuly 17, 1985Term endedFeb 12, 2002

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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