Cutting insert
CA 2036930 C · Owner: Mitsubishi Materials Corporation · Inventors: Fukuoka, Hitoshi; Kodera, Yuichi; Sato, Katuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a cutting insert, a base plate is formed into a polygonal configuration having a plurality of corners. At least one cutting-edge element is mounted on an upper surface of the corner of the base plate. The cutting-edge element is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other. The cutting-edge element is brased to the upper surface of the corner of the base plate under such a condition that the super-hard sintered section is exposed to an upper surface of the base plate. The super-hard sintered section has its upper surface which is formed therein with a chip breaker having a surface roughness within a range of from …
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 February 22, 1991 and granted January 9, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 2013.
- 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.