Block pattern tire with optimized groove depth ratios, sipe depth and length ratios
CA 2084741 C · Owner: Ochiai, Kiyoshi · Inventors: Numata, Kazuki; Ochiai, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A block pattern tire is provided herein. It comprises a tread portion provided in the, central part with a circumferential row of blocks which are divided by two wide main, circumferential grooves and axial grooves extending therebetween. The thread portion is, provided, in its tread surface with a plurality of first sipes which are narrower than the, circumferential grooves and axial grooves. The axial grooves are shallower than the, circumferential grooves. Each of the axial grooves is provided in the bottom , face thereof, with a second sipe having a width of 0.2 to 1.1 mm the second sipe extending , along the, centre line of the axial groove and having ends terminated within the …
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 December 7, 1992 and granted April 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2014.
- 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.