Process for preventing the formation of flue gases in metallurgical processes and during the transport of molten metal from a metallurgical vessel to casting vessels and device for transporting molten metals from a metallurgical furnace to a casting vessel

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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.

Why it's free to use

• Filed December 20, 1989 and granted May 26, 1993. 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.