Integrated carbonaceous fuel drying and gasification process and apparatus
CA 2134871 C · Owner: Huynh, Danh Q. · Inventors: Campisi, Anthony; Johnson, Terence R.; Anderson, Bernard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a process and apparatus for gasifying a particulate solid carbonaceous fuel with a high moisture content, the process comprising: introducing the fuel into one or more pressurized drying vessels without adding water to the fuel: reducing the moisture content of the fuel in the drying vessel(s) to a level suitable for gasification by passing hot product gas through the or each drying vessel such that the fuel particles are entrained in the gas flow, thereby cooling and humidifying the gas: separating the cooled and humidified gas from the fuel; transferring the fuel with reduced moisture content from the or each drying vessel to a gasification vessel gasifying …
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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 May 4, 1993 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2015.
- 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.