Carboxylated nitrile rubber vulcanization
CA 1256244 A · Owner: Polysar Limited · Inventors: Blackshaw, George C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A process is provided for the preparation of vulcanizates of carboxylated butadiene-acrylonitrile polymers having improved dynamic properties in which the vulcanizable mixture contains a lead compound selected from red lead oxide and white lead silicate. The vulcanizates prepared by the process of the present invention are suitable for use in roll covers solid, tires, belting and mechanical goods.
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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.