Peroxide vulcanizable butyl compositions useful for rubber articles
CA 2587743 C · Owner: Crockett, Treena · Inventors: Gronowski, Adam A.; Crockett, Treena; Osman, Akhtar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a peroxide curable rubber composition containing a butyl rubber polymer, a high vinyl polybutadiene polymer; an olefin polymer of ethylene, at least one alpha-olefin and optionally at least , one diene, and between 1 to 10 phr of a peroxide curing agent. The present invention is also directed to a peroxide curable rubber composition containing a butyl polymer, an EP(D)M rubber polymer and a 1,2-polybutadiene polymer. , Shaped articles made from the compositions find use as containers for pharmaceuticals, a condenser cap, a seal for fuel cells a container , containing electrolytes, rings dampening devices, seals and sealants.
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
- Filed November 16, 2005 and granted May 28, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.