Pneumatic tire
CA 2026675 C · Owner: Iwahashi, Yoshiichiro · Inventors: Kakumu, Kiichiro; Tanaka, Masatoshi; Shiraishi, Masaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic tire has a block pattern which is divided by plural circumferential grooves extending in the circumferential direction of a tire and a number of lateral grooves crossing the circumferential grooves. In the block pattern the block circum-, ferential/lateral ratio Lm/Wm of the average block circumferential length Lm to the average block width Wm is 0.38 or more and 0.55 or less, and the block circumferential length ratio Lm/L of the average block circumferential length Lm to the circumferential length L of the tread part is 1/120 or more and 1/85 or less.
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 2, 1990 and granted February 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2012.
- 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.