Method and apparatus for producing iron carbide
CA 2216993 C · Owner: Uchiyama, Yoshio · Inventors: Inoue, Eiji; Iijima, Satoru; Uchiyama, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides method and apparatus capable of producing iron carbide having any quality, both quickly and economically. The method of producing iron carbide(Fe3C) comprises reducing and carburizing iron-containing raw materials for iron making such as iron ore and the, like containing iron oxides (e.g. hematite) and iron hydroxides as main components. The hematite is partially reduced to a reduction ratio of 50 to 65%, by a gas containing mainly hydrogen in a first stage of the reaction process then, the partially reduced hematite is further reduced and carburized by - a gas containing mainly hydrogen and methane in a second stage of the reaction process, to provide iron …
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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 27, 1996 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.