Hearth bottom, more particularly for dc arc furnaces
CA 1262166 C · Owner: Bohn, Kurt · Inventors: Gelsdorf, Gunter; Hlawatschek, Hartmut; Schubert, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The service durability of the hearth bottom of DC arc furnaces in which steel rods embedded in the bottom act as the anode is to be improved. To accomplish this, the bottom has at least in the area of the steel rods (9) an upper fire-side layer (12) formed from chromic-oxide-containing magnesia and a lower, organically bound graphite layer (14) as well as an intermediate, layer (13) consisting of a mixture of the two materials.
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
- Granted October 3, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 3, 2006.
- 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.