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Expired European patentEurope

Control device and method for a wide speed range induction machine based upon flux estimation performed by means of a Luenberger state observer

EP 1158658 B1 · Applicant: C.R.F. Società Consortile per Azioni

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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 May 25, 2001 and granted September 9, 2009. A European patent lasts at most 20 years from filing, so its term ended May 25, 2021.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledMay 25, 2001
PublishedNovember 28, 2001
GrantedSeptember 9, 2009
Term endedMay 25, 2021
Application numberEP 01112719
Classification (CPC)H02P21/141

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedMay 25, 2001PublishedNov 28, 2001Patent grantedSep 9, 2009Term endedMay 25, 2021

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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