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Induction motor control apparatus providing high efficiency with rapid response to changes in load torque

EP 0631374 A2 · Applicant: AREX ELECTRONICS CORPORATION

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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 June 21, 1994 and never granted as a European patent. Had it been granted, its 20-year term would have ended June 21, 2014.
  • 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 December 21, 2019.
  • 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.
FiledJune 21, 1994
PublishedDecember 28, 1994
GrantedNever granted
Term endedJune 21, 2014
Application numberEP 94109546
Classification (CPC)H02J3/1892 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 21, 1994PublishedDec 28, 1994Term endedJune 21, 2014

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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