Manufacture of cement
CA 1136853 A · Owner: Lafarge Consultants Ltd. · Inventors: St. John, Charles F.; Mercier, Gil A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Volatiles-rich dust and kiln gases are removed from a cement kiln by means of a special by-pass probe system located in the inlet end of the kiln. The probe system is designated to prevent the build-up of solidified volatiles-rich dust on the probe surfaces.
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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.