High performance tire tread rubber composition
CA 2277666 A1 · Owner: Halasa, Adel Farhan · Inventors: Hsu, Wen-Liang; Sandstrom, Paul Harry; Halasa, Adel Farhan
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 tire tread compound that can be used in manufacturing tires having outstanding traction characteristics without compromising treadwear and rolling resistance. The tire tread compounds of this invention are made utilizing an isoprene-butadiene rubber having a high glass transition temperature and having SnR3 end groups, wherein R represents an alkyl group such as a, tertiary-butyl group. These isoprene-butadiene rubbers are made by reacting an isoprene-butadiene rubber having a glass transition temperature which is within the range of about -50°C to about 0°C with a tin compound of the formula SnR3X, wherein R represents an alkyl group and wherein X represents a …
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 July 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2021.
- 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.