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Expired European patentEurope

Carbon foundation for metallurgical furnaces, and method for its manufacture

EP 0061981 B1 · Applicant: SOCIETE DES ELECTRODES ET REFRACTAIRES SAVOIE (SERS)

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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 29, 1982 and granted October 31, 1984. A European patent lasts at most 20 years from filing, so its term ended March 29, 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 September 29, 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.
FiledMarch 29, 1982
PublishedOctober 6, 1982
GrantedOctober 31, 1984
Term endedMarch 29, 2002
Application numberEP 82420041
Classification (CPC)F27D1/12 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedMarch 29, 1982PublishedOct 6, 1982Patent grantedOct 31, 1984Term endedMarch 29, 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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