Processing green strength polymers
CA 1100732 A · Owner: Polysar Limited · Inventors: Briggs, George J.; Wei, Yung-Kang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESSING GREEN STRENGTH POLYMERS", Abstract of the Disclosure An improved method is provided for processing of rubbers in which one of the rubbers is a synthetic green strength polymer, the improvement being the addition of the synthetic green strength polymer at the second stage of mixing rather than at the prior art first stage. The method can be used for preparing rubber compounds whenever a synthetic green strength polymer is used as one component of the rubber compound. - 1-
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 May 12, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 1998.
- 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.