Pneumatic tire with tread of medium vinyl polybutadiene/rubber blend
CA 1196138 A · Owner: The Goodyear Tire & Rubber Company · Inventors: Haas, Edward J.; Scriver, Richard M. Jr.; Montgomery, Edward C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pneumatic tire1 having a tread2 composed of (A) medium vinyl polybutadiene rubber, (B) low vinyl polybutadiene rubber and, optionally, (C) cis 1,4polyisoprene rubber. In a preferential aspect the medium vinyl polybutadiene is required to be of a type prepared by polymerizing 1,3-butadiene with a small amount of divinylbenzene in a hydrocarbon solvent with an alkyl lithium catalyst and in the presence of a polar catalyst modifier.
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
- Granted October 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2002.
- 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.