Ash melting furnace
CA 2106746 C · Owner: Inoue, Satoshi · Inventors: Hagihara, Hitoshi; Inoue, Satoshi; Fukusaki, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ash melting furnace disposes of the combustion ash resulting from the incineration of municipal or other sorts of waste by melting it utilizing as the main fuel the unburnt carbon contained in the ash itself. The ash melting furnace includes an auxiliary heat source preferably a plasma torch which uses air for the working gas and which is so placed, facing the combustion ash heaped up within the furnace as to project its hot gas jet thereon. The furnace further includes a torch controller that actuates the plasma torch to secondarily heat and melt the ash when required.
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 September 22, 1993 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 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.