Manufacture of portland cement
CA 1054365 A · Owner: Associated Portland Cement Manufacturers Limited (The) · Inventors: Pennell, Anthony R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of calcining solid materials on a downdraught travelling grate prior to treatment at a higher temperature on a continuously operating kiln, wherein heat for said calcining is obtained by drawing hot gaseous effluent from the kiln into the travelling grate through the solids discharge outlet thereof in, which additional heat is induced into a downstream portion of the travelling grate by incinerating combustible waste on the bed in the downstream portion of the travelling grate.
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 May 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 1996.
- 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.