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Expired European patentEurope

Process for treating phosphided slags

EP 0067093 B1 · Applicant: INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID)

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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 May 17, 1982 and granted April 3, 1985. A European patent lasts at most 20 years from filing, so its term ended May 17, 2002.
  • 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 November 17, 2007.
  • 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.
FiledMay 17, 1982
PublishedDecember 15, 1982
GrantedApril 3, 1985
Term endedMay 17, 2002
Application numberEP 82400906
Classification (CPC)C21C7/064 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedMay 17, 1982PublishedDec 15, 1982Patent grantedApril 3, 1985Term endedMay 17, 2002

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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