Metallurgical furnace
CA 2581979 C · Owner: Kojo, Ilkka · Inventors: Hugg, Eero; Kojo, Ilkka; Saarinen, Risto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention is a metallurgical furnace (1) the wall of which , comprises an external steel structure (5) and a refractory lining (3) inside the steel structure, the lining (3) consisting of at least one course of bricks (4) in the direction of thickness of the wall of the furnace (1) and , that essentially horizontal, ledge-like cooling elements (6) are arranged in the brick lining (3) of the wall of the furnace (1 ) extending to a length , (L) from the outer surface (20) of the brick lining (3) of the furnace (1) towards its inner surface (9), the length (L) in the area of the molten material (2) of the furnace (1 ) and its vicinity typically being from 50 to 100% of …
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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 October 11, 2005 and granted April 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2025.
- 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.