Pneumatic tire with sidewall protrusions for enhanced operation on snow covered terrain
CA 2006573 C · Owner: Ochiai, Kiyoshi · Inventors: Ochiai, Kiyoshi; Numata, Kazuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic tire is provided having improved road grip performance on snowy roads. The pneumatic tire incudes a tread portion and a pair of , sidewall, portions extending radially-inwardly from an associated tread edge to an associated, bead portion. The tread portion includes primary circumferentially-extending , main, grooves which are disposed on each associated side of the equator of the tire and, lateral grooves extending from the main grooves to the tread edges to open at the, axially-outer end thereof at the face of the sidewall portion. This structure forms, in, each shoulder region, a row of shoulder blocks which are arranged circumferentially, of the tire along each tread …
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 22, 1989 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.