High performance tire
CA 1296982 C · Owner: Fujiwara, Kenichi · Inventors: Fujiwara, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic tire characterized in that: a tread is divided into a crown portion having a width corresponding to about 30% to 65% of the tread width and two shoulder portions by at least two longitudinal grooves extending in substantially zigzag or wavy line; the crown portion is provided with one or more central ribs or central block rows; each shoulder portion is provided with one or more outer ribs or outer blocks; and the rib or blocks on shoulder portions are provided with a plurality of narrow cut grooves so that the circumferential stiffness index of the pattern and a volume index of the narrow cut grooves my be set at 30 to 70 and 2.5 to 15, respectively.
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
- Granted March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- 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.