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Expired European patentEurope

Direct current arc furnace or ladle

EP 0201669 B1 · Applicant: ASEA AB

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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 February 17, 1986 and granted January 17, 1990. A European patent lasts at most 20 years from filing, so its term ended February 17, 2006.
  • 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 August 17, 2011.
  • 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.
FiledFebruary 17, 1986
PublishedNovember 20, 1986
GrantedJanuary 17, 1990
Term endedFebruary 17, 2006
Application numberEP 86102018
Classification (CPC)C04B35/013 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedFeb 17, 1986PublishedNov 20, 1986Patent grantedJan 17, 1990Term endedFeb 17, 2006

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.