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Expired European patentEurope

Earthing switch for a metal-encapsulated high-voltage switchboard plant insulated by pressurised gas

EP 0494151 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 August 14, 1990 and granted July 20, 1994. A European patent lasts at most 20 years from filing, so its term ended August 14, 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 February 14, 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.
FiledAugust 14, 1990
PublishedJuly 15, 1992
GrantedJuly 20, 1994
Term endedAugust 14, 2010
Application numberEP 90911998
Classification (CPC)H02B13/075

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedAug 14, 1990PublishedJuly 15, 1992Patent grantedJuly 20, 1994Term endedAug 14, 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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