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Expired European patentEurope

Direct reduction process and apparatus

EP 0508166 B1 · Applicant: ZIA METALLURGICAL PROCESSES, INC.

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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 March 17, 1992 and granted August 27, 2003. A European patent lasts at most 20 years from filing, so its term ended March 17, 2012.
  • 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 September 17, 2017.
  • 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.
FiledMarch 17, 1992
PublishedOctober 14, 1992
GrantedAugust 27, 2003
Term endedMarch 17, 2012
Application numberEP 92104620
Classification (CPC)C22B7/02 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedMarch 17, 1992PublishedOct 14, 1992Patent grantedAug 27, 2003Term endedMarch 17, 2012

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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