Extruding die for metallic materials
CA 2001768 C · Owner: Tanaka, Takeshi · Inventors: Oki, Yoshinari; Yoshida, Yoshihiro; Tanaka, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extruding die for metallic materials comprising a male die and a female die is improvided with a billetreceiving face of the male die shaped into convex form. It is possible to recduce breakage frequency of the extruding die by reducing the tensile stress applied on the male die at the time of the extrusion.
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 October 30, 1989 and granted May 10, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.