Alumina-base ceramic sinter and process for producing the same
CA 2275468 A1 · Owner: Sasaki, Toyoshige · Inventors: Okuma, Eiji; Nagano, Mitsuyoshi; Tamura, Haruka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alumina-base ceramic sinter having high hardness excellent wear , resistance, high strength and high toughness being suitable particularly for , cutting tools and wear-resistant members and containing 5-70 % by volume of , WC having a crystal grain size of 5 µm or less and 5-70 % by volume of a Ti(C, N) solid solution having a molar C/N ratio ranging from 1/9 to 9/1.
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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 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 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.