Method of preparing waste material for disposal
CA 2078285 C · Owner: Ash Grove Cement Company · Inventors: Tutt, James Ronald; Peterson, Charles Daniel; Cody, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for preparing hazardous waste material for environmentally sound disposal by thermal degradation, said method comprising the steps of blending the hazardous waste to form a hazardous waste homogenated and, packaging portions of said homogenate into sealed containers said sealed containers of waste homogenate being adapted to be charged into a rotary kiln.
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 November 22, 1989 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2011.
- 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.