Cement calcining apparatus
CA 1079065 A · Owner: Onoda Cement Co. Ltd. · Inventors: Saito, Ikuo; Ueda, Yoshihiko; Fukuda, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cement calcining apparatus having a suspension preheater with a precalcining furnace, said precalcining furnace is provided with a constant-feed burner to which a rated amount of pulverized coal of specified density or the like solid fuel having the same property as of the coal is always being blasted and a load control burner for controlling the amount of the pulverized coal or the like solid fuel having the same property as of the coal to be blasted in response to the variation of load. Whereby said calcining apparatus is enabled to have a wide range of load control. - 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
- Granted June 10, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 1997.
- 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.