Patent Yard Sign in
Expired European patentEurope

Method of controlling three-phase, three-level inverter

EP 0451440 B1 · Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed January 14, 1991 and granted November 29, 1995. A European patent lasts at most 20 years from filing, so its term ended January 14, 2011.
  • 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 July 14, 2016.
  • 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.
FiledJanuary 14, 1991
PublishedOctober 16, 1991
GrantedNovember 29, 1995
Term endedJanuary 14, 2011
Application numberEP 91100378
Classification (CPC)H02M7/487

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 14, 1991PublishedOct 16, 1991Patent grantedNov 29, 1995Term endedJan 14, 2011

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.