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Expired European patentEurope

Method and arrangement for the generation of a 12-phase control signal system from a 6-phase control signal system

EP 0478809 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 September 29, 1990 and granted December 7, 1994. A European patent lasts at most 20 years from filing, so its term ended September 29, 2010.
  • 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 March 29, 2016.
  • 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.
FiledSeptember 29, 1990
PublishedApril 8, 1992
GrantedDecember 7, 1994
Term endedSeptember 29, 2010
Application numberEP 90118759
Classification (CPC)H02M7/162 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedSep 29, 1990PublishedApril 8, 1992Patent grantedDec 7, 1994Term endedSep 29, 2010

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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