Treatment of particulate materials
CA 1059537 A · Owner: English Clays Lovering Pochin And Company Limited · Inventors: Clark, Norman O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cement clinker is produced by forming a raw cement slurry; dewatering the raw cement slurry in a pressure filter at a pressure in excess of 1450 psig to form a filter cake containing less than 15% by weight moisture; and subjecting said filter cake to a heat treatment at an elevated temperature for a time sufficient to produce therefrom a cement clinker.
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 July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 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.