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Expired European patentEurope

Manufacture of iron and steel in a duplex smelter and solid state oxide suspension prereducer

EP 0449891 B1 · Applicant: CRA SERVICES LIMITED

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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 December 20, 1989 and granted October 30, 1996. A European patent lasts at most 20 years from filing, so its term ended December 20, 2009.
  • 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 June 20, 2015.
  • 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.
FiledDecember 20, 1989
PublishedOctober 9, 1991
GrantedOctober 30, 1996
Term endedDecember 20, 2009
Application numberEP 90900737
Classification (CPC)C21B13/14

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedDec 20, 1989PublishedOct 9, 1991Patent grantedOct 30, 1996Term endedDec 20, 2009

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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