Rubber composition with liquid high tg polymer and tire with tread thereof
CA 2296896 A1 · Owner: Blok, Edward John · Inventors: Futamura, Shingo; Kralevich, Mark Leslie Jr.; Sandstrom, Paul Harry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a rubber composition composed of high Tg dime-based elastomers and which contains a high Tg liquid polymer of high vinyl polybutadiene and to such a composition being sulfur cured. The invention also relates to a tire having a tread of such rubber composition.
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 January 24, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 24, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2022.
- 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.