Vulcanizable elastomer compositions containing starch/styrene butadiene rubber copolymer as a reinforcing filler
CA 2438708 C · Owner: Pawlikowski, John · Inventors: Pawlikowski, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a vulcanizable elastomer composition comprising100 parts by weight of an elastomer; about 5 to about 80 parts by weight of reinforcing filler, per 100 parts of the elastomer including a , starch/emulsion styrene butadiene copolymer; about 1 to about 6 parts by weight of a coupling agent, per 100 parts of the elastomer said coupling , agent having a moiety reactive with the hydroxyl groups of the starch/emulsion styrene butadiene copolymer and a second moiety reactive with said elastomer; about 40 to about 115 parts of an additional reinforcing filler per 100 parts , of the elastomer, wherein said filler is selected from the group consisting of carbon …
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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
- Filed February 12, 2002 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2024.
- 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.