Method and system for controlling pollutant emissions in combustion operations
CA 2185691 C · Owner: Mcqueen, Anne T. · Inventors: Bouse, Earl F. Jr.; Leonard, R. Leon; Mcqueen, Anne T.
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 methods and systems for reducing pollutant emissions associated with combustion operations e.g. cement manufacturing. , The invention further relates to the disposal of sludge e.g. produced by , waste water treatment plants by introducing it into the combustion process. In particular, the invention provides for introducing particles of aqueous sludge into a kiln at a point in the kiln effective to reduce pollutant emissions in outlet flue gasses produced by the kiln. Optimally the sludge is , introduced at a point in which maximum NOx emission rductions can occur and maximum HC1 emission reductions can occur downstream (at lower temperatures). In a …
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 March 16, 1995 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2017.
- 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.