Cutting tool for milling
CA 2233401 C · Owner: Nakai, Tetsuo · Inventors: Nakai, Tetsuo; Uesaka, Shinya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutting tool for milling comprises an insert consisting of a cubic boron nitride sintered body having heat conductivity of at least 400 W/m~K at 120°C and a thermal expansion coefficient within the range of at least 3.0 x 10 -6/K and not more than 4.0 x 10 -6/K in the temperature range of 20°C to 600°C. According to this cutting tool for milling, sufficient tool life can be attained in high-speed face milling under a wet condition and high-speed end milling under a wet condition.
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 March 26, 1998 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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.