Pneumatic tire
CA 2080328 C · Owner: Sumitomo Rubber Industries, Ltd. · Inventors: Ochiai, Kiyoshi
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 herein comprising a tread portion having a pair of tread edges. The tread portion is provided with at least two main circumferential grooves and with axial grooves to define tread blocks which are arranged in two or more circumferential rows. The tread blocks comprise shoulder blocks which are between each axially-outermost main circumferential groove and each tread edge. Each of the shoulder blocks is provided with a narrow circumferential shoulder groove so as to subdivide the block axially into an axially-outer shoulder block part and an axially-inner shoulder block part. The axial width of the axially-outer shoulder block part, measured from the tread edge …
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 9, 1992 and granted July 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 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.