Sintered ceramic article and method of manufacturing the same
CA 2005686 C · Owner: Kuwabara, Mitsuo · Inventors: Kuwabara, Mitsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sintered ceramic article which is to be joined to metal or form a composite member with metal comprises a metal compound or a metal separated and diffused in surface layers of particles of the sintered ceramic article. The sintered ceramic article is manufactured for example, by, forming a shaped article of ceramic powder provisionally, firing the shaped article thereafter impregnating the pro-, visionally fired article with a metal salt and/or a metal complex; and fully firing the provisionally fired article to produce a sintered ceramic article.
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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 December 15, 1989 and granted November 5, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2011.
- 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.