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Expired European patentEurope

Method of controlling the magnetic flux of an asynchronous machine, and apparatus therefor

EP 0093929 B1 · Applicant: BROWN, BOVERI & CIE Aktiengesellschaft

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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 April 23, 1983 and granted February 26, 1986. A European patent lasts at most 20 years from filing, so its term ended April 23, 2003.
  • 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 October 23, 2008.
  • 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.
FiledApril 23, 1983
PublishedNovember 16, 1983
GrantedFebruary 26, 1986
Term endedApril 23, 2003
Application numberEP 83103996
Classification (CPC)H02P27/045 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedApril 23, 1983PublishedNov 16, 1983Patent grantedFeb 26, 1986Term endedApril 23, 2003

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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