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Expired European patentEurope

Oxygen steelmaking plant having a sublance installation

EP 0258929 B1 · Applicant: HOOGOVENS GROEP B.V.

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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 19, 1987 and granted October 18, 1989. A European patent lasts at most 20 years from filing, so its term ended August 19, 2007.
  • 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 19, 2013.
  • 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 19, 1987
PublishedMarch 9, 1988
GrantedOctober 18, 1989
Term endedAugust 19, 2007
Application numberEP 87201570
Classification (CPC)C21C5/4673

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedAug 19, 1987PublishedMarch 9, 1988Patent grantedOct 18, 1989Term endedAug 19, 2007

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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