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Expired European patentEurope

Plasma arc torch with improved nozzle shield and step flow

EP 0487573 B1 · Applicant: HYPERTHERM, INC.

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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 July 10, 1990 and granted November 23, 1994. A European patent lasts at most 20 years from filing, so its term ended July 10, 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 January 10, 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.
FiledJuly 10, 1990
PublishedJune 3, 1992
GrantedNovember 23, 1994
Term endedJuly 10, 2010
Application numberEP 90912223
Classification (CPC)H05H1/34 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedJuly 10, 1990PublishedJune 3, 1992Patent grantedNov 23, 1994Term endedJuly 10, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.