Method and apparatus for grinding iron ore or iron ore concentrate
CA 2476579 C · Owner: Thyssenkrupp Polysius Aktiengesellschaft · Inventors: Zurhove, Franz-Josef; Burchardt, Egbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and apparatus for grinding iron ore or iron ore concentrate, the material being ground in circulation in a material bed roll mill one , fraction of the iron ore , or iron ore concentrate ground in the material bed roll mill being recirculated to the material , bed roll mill and the other fraction of the iron ore or iron ore concentrate being classified into , oversize material and fines the oversize material being returned to the material bed roll mill.
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 August 5, 2004 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2026.
- 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.