Hard sintered body for tool
CA 2217175 C · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Nakai, Tetsuo; Fukaya, Tomohiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hard sintered body for a tool contains 25 to 47 vol. % of cBN 40 to 70 vol. % especially less than 45 vol.% in total of a carbo-nitride, and a boride of Ti and 2 to 20% vol.% in total of a boride and a nitride of Al. In the carbo-nitride of Ti the ratio of carbon to nitrogen is in the range of 60:40 to 30:70. In this hard sintered body cBN particles are bonded to each other through binder phases. The obtained product is a hard sintered body for a tool which is excellent in wear resistance and chipping resistance for high-speed cutting of hardened steel.
Read the whole patent
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 September 30, 1997 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2019.
- 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.