Rotating boring tool
CA 2198736 C · Owner: Kanefusa Kabushiki Kaisha · Inventors: Nishio, Satoru; Mantani, Tetsuro; Ogura, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotating boring tool (10) comprises a cylindrical shank (11) and a body (12), both of which are coaxial with each other said body being provided at , its tip end with cutting blades (13a 13b) which are in point symmetry with respect to an axis of the shank. Provided on the body are two flutes (14a 14b) continuous from the cutting blades. The both flutes are made to approach each other at the lower half lead portions (designated hereinbelow as f1 portions) of terminal end portions f0 of the flutes and positioned about 35 degrees or more offset from the position of point symmetry. Alternatively the , both flutes are merged at the f1 portions. Accordingly thickened portions y0 , are …
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 25, 1995 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2017.
- 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.