Patent Yard Sign in
Expired European patentEurope

Commutation circuit with a fast diode, incorporating means for damping the oscillations on opening it

EP 0189340 B1 · Applicant: THOMSON-CSF

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 10, 1986 and granted May 17, 1989. A European patent lasts at most 20 years from filing, so its term ended January 10, 2006.
  • 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 10, 2011.
  • 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 10, 1986
PublishedJuly 30, 1986
GrantedMay 17, 1989
Term endedJanuary 10, 2006
Application numberEP 86400054
Classification (CPC)H02M7/062 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedJan 10, 1986PublishedJuly 30, 1986Patent grantedMay 17, 1989Term endedJan 10, 2006

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.