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Expired European patentEurope

Combined star-polygon plural phase winding for an electric machine

EP 0557809 B1 · Applicant: SIEMENS 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 February 11, 1993 and granted January 22, 1997. A European patent lasts at most 20 years from filing, so its term ended February 11, 2013.
  • 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 11, 2018.
  • 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 11, 1993
PublishedSeptember 1, 1993
GrantedJanuary 22, 1997
Term endedFebruary 11, 2013
Application numberEP 93102155
Classification (CPC)H02K3/28

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedFeb 11, 1993PublishedSep 1, 1993Patent grantedJan 22, 1997Term endedFeb 11, 2013

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.