Pelletizing ash
CA 2039074 A1 · Owner: Cox, Richard K. · Inventors: Schumann, Richard A.; Bland, Alan E.; Bland, Alan E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
WDP\16046-11095.abs, PELLETIZING ASH, Abstract The invention includes a method for pelletizing ash from a fluidized bed combustor in which limestone particles are suspended in the presence of carbonaceous fuel being burned. Limecontaining bed ash ("FBCR") is produced in the combustor and fly, ash ("FBC fly ash") is generated as a by-product of the combustion process. The method includes the step of obtaining FBCR and FBC fly ash generated during the combustion process. Water is added to the FBCR so as to convert a substantial portion of the lime to hydrated lime. Water is added to the FBC fly ash and pellets are formed from the FBC fly ash. The FBC fly ash pellets are coated with the …
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 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2013.
- 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.