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Expired European patentEurope

Method and device for determining the angular velocity of a rotor of a sensorless field orientated polyphase machine

EP 0956641 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 January 19, 1998 and granted September 13, 2006. A European patent lasts at most 20 years from filing, so its term ended January 19, 2018.
  • 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 19, 2023.
  • 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 19, 1998
PublishedNovember 17, 1999
GrantedSeptember 13, 2006
Term endedJanuary 19, 2018
Application numberEP 98907827
Classification (CPC)H02P21/12 +2 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedJan 19, 1998PublishedNov 17, 1999Patent grantedSep 13, 2006Term endedJan 19, 2018

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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