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Expired European patentEurope

Digital current differential system

EP 0873583 B1 · Applicant: GENERAL ELECTRIC COMPANY

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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 September 12, 1997 and granted December 7, 2005. A European patent lasts at most 20 years from filing, so its term ended September 12, 2017.
  • 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 12, 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.
FiledSeptember 12, 1997
PublishedOctober 28, 1998
GrantedDecember 7, 2005
Term endedSeptember 12, 2017
Application numberEP 97941046
Classification (CPC)H02H3/40 +2 more

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedSep 12, 1997PublishedOct 28, 1998Patent grantedDec 7, 2005Term endedSep 12, 2017

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.