Rotary friction member, and process for producing the same
CA 2298154 C · Owner: Honda Giken Kogyo Kabushiki Kaisha · Inventors: Kitamura, Katsuhiro; Shibata, Katsuhiro; Nakamura, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention ensures that the warping of an annular disk body of a brake disk, in the direction of a rotational axis due to a friction heat, is, inhibited to a large extent. The brake disk includes an aluminum alloy matrix a plurality of alumina aggregates dispersed in the matrix and a plurality of, fine alumina grains. The alumina aggregates have an aspect ratio A larger than 1. In an annular disk body, the alumina aggregates are oriented with their lengthwise directions aligned with the radial direction of the disk body.
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 7, 2000 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2022.
- 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.