Surface treating method and apparatus
CA 1268103 C · Owner: Kabushiki Kaisha Toyota Chuo Kenkyusho · Inventors: Takeda, Hiromasa; Arai, Tohru; Endo, Junji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus of forming a layer of a carbide or nitride of, for example, titanium or vanadium on-the surface of the material to be treated in a fluidized bed furnace. A refractory powder for forming a fluidized bed, a vessel or vessels filled with powder of a treating agent, and the material to be treated are placed in the furnace. The treating agent includes powder of at least one carbide or nitride forming metal or alloy and powder of at least one compound selected form the group consisting of chlorides, fluorides, bromides, iodides and borofluorides of alkali and alkaline earth metals and/or at least one of an ammonium halide and a metal halide. A fluidizing gas is introduced …
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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
- Granted April 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- 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.