Electric arc furnace
CA 2599208 C · Owner: Paul Wurth S.A. · Inventors: Tockert, Paul; Lonardi, Emile; Roth, Jean-Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric arc furnace 10 has an outer shell 12 and an inner refractory lining 24. , During its operation the electric arc furnace 10 contains a bath 28 of molten metal , which has a minimum and a maximum operational level 32. An inner cooling ring 23 , of copper slabs 20, which are in thermo-conductive contact with the inner refractory , lining 24 and equipped with spray cooling means 22 is mounted to the outer , shell 12 , in the region 34 between the minimum and the maximum operational level 32.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 28, 2006 and granted October 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.