Pneumatic tyre
CA 2010580 C · Owner: Uchida, Mamoru · Inventors: Taguchi, Takafumi; Uchida, Mamoru; Muraoka, Kiyoshige
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic tyre having at least one layer of carcass having one end and another end engaged with a pair of bead cores on both sides with each of the ends being tuned up outwardly from inner side arround each of the pair of bead cores, and an inner liner made of rubber composition located radially inside of the carcass wherein rubber component in the inner liner rubber composition consists essentially of butyl rubber containing halogenated butyl rubber in the range of 60 to 95 % by weight. The tyre is free from a crack generation problem due to thermal hardening and from a carcass chord corrosion problem, and suitably applied especially to heavy duty use.
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 February 21, 1990 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 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.