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Expired European patentEurope

Method and apparatus for detecting the wiring phase of an arbitrary unknown phase voltage relative to a reference phase voltage

EP 1756594 B1 · Applicant: Enel Distribuzione S.p.A.

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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, 2004 and granted March 10, 2010. A European patent lasts at most 20 years from filing, so its term ended May 25, 2024.
  • 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, 2004
PublishedFebruary 28, 2007
GrantedMarch 10, 2010
Term endedMay 25, 2024
Application numberEP 04734683
Classification (CPC)G01R25/00 +1 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedMay 25, 2004PublishedFeb 28, 2007Patent grantedMarch 10, 2010Term endedMay 25, 2024

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

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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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