Heavy duty vehicle pneumatic tires
CA 2106795 C · Owner: Matsue, Akihiko · Inventors: Ohtake, Toru; Matsue, Akihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heavy duty vehicle pneumatic tire comprising a tread, wherein the tread is composed of a diene-based rubber composition, and crystalline syndiotactic-1,2-polybutadiene is incorporated into said rubber, composition in an amount of 5 to 60 parts by weight relative to 100 parts by weight of a diene-based rubber component of the rubber composition. The syndiotactic 1,2-polybutadiene has a melting point of 130 to 170°C an average particle diameter of not more than 100 Vim and a ratio of a major axis to a minor axis (L/D) being not more than 3. The content of 1,2-structural units in the syndiotactic-1,2 polybutadiene is not less than 75 % by weight, and a syndiotacticity of the 1,2-structural …
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 September 23, 1993 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2015.
- 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.