Metallurgical furnace
CA 2581978 C · Owner: Outotec Oyj · Inventors: Saarinen, Risto; Hugg, Eero; Kojo, Ilkka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the structure of the bottom area of a metallurgical furnace (1), comprising a bottom part (2) and a wall (3) both of which , include a steel structure (6 21) forming the external surface, and a refractory inner brick lining (12), the bottom part (2) and the wall (3) being joined together; the wall (3) of the furnace (1) is divided into a lower part (4) and an upper part (30), whereby the steel structure (21) of the lower part (4) is a separate ring consisting of parts (23) joints (19) being provided , between the parts (23) and arranged to expand. The invention further relates to a method for controlling the expansion of the furnace (1).
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 October 11, 2005 and granted September 10, 2013. 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.