A surface nitriding method of an aluminum material, and an agent for nitriding
CA 2206202 C · Owner: Miura, Hirohisa · Inventors: Miura, Hirohisa; Yamada, Yasuhiro; Katoh, Haruzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention aims to provide a nitriding method of forming a relatively thick nitride layer on the surface of an aluminum material containing silicon, and an auxiliary agent for nitriding. By using a nitriding auxiliary agent mainly comprising aluminum containing a metal such as lithium or boron which has, a high bonding strength with oxygen coexists with silicon to, form substantially no silicide or a nitriding auxiliary agent, mainly comprising an Al-Mg-Cu alloy or an Mg-Zn-Cu alloy heat, treatment is applied by nitrogen gas with the aluminum material to be nitrided contacted with the nitriding auxiliary agent. Hence a thick nitride layer can be easily formed even on the surface of an …
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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 October 2, 1996 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2018.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.