High trans butadiene based elastomeric block copolymers and blends
CA 1265633 C · Owner: Fabris, Hubert J. · Inventors: Wilson, John A.; Aggarwal, Sundar L.; Hargis, Ivan G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rubbery high trans-high vinyl diblock copolymers blends of, rubbery high trans copolymers and rubbery high vinyl polymers and mixtures (alloys or blends) of said diblock copolymers high, trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility good rolling, resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers copolymers and, polymers are made by solution polymerization. The diblock copolymer may be …
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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
- Granted February 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2007.
- 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.