Tires
CA 2107752 C · Owner: Kikuchi, Naohiko · Inventors: Kikuchi, Naohiko; Saito, Yuichi; Ohki, Masahiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radial tire having a tread of cap/base structure, which tread has a thickness of not more than 6 mm, characterized by the base tread comprising a rubber composition of 16 to 30 parts by weight of short fibers and 30 to 60 parts by weight of carbon black having an iodine adsorption amount of 60 to 130 mg/g or a rubber, composition of 10 to 30 parts by weight of short fibers and 5 to 30 parts by weight of carbon black. The short fibers in the base tread may be oriented in either the peripheral or radial direction of the tire. The tire has a low rolling resistance and is excellent in both steering stability and ride comfort.
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 5, 1993 and granted June 5, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2015.
- 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.