Joined structure of dissimilar metallic materials
CA 2254349 C · Owner: Itoh, Yoshiyasu · Inventors: Suzuki, Katsumi; Itoh, Yoshiyasu; Shindo, Takahiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates generally to a joined structure of dissimilar metallic materials having different characteristics. More specifically the invention relates to a joined structure of a current-carrying contact or arching contact which are used for e.g. a power breaker, or a coating end structure of a metal base and a coating material for improving conductivity and heat resistance. It is therefore an object of the present invention to provide a joined structure which enhances the impact strength of a joined member and which has a high reliability in the joining of dissimilar metallic materials having different material characteristics. It is another object of the present invention …
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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 November 18, 1998 and granted November 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2020.
- 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.