Dynamically cured thermoplastic olefin polymers and process for producing the same
CA 2049564 A1 · Owner: Advanced Elastomer Systems, L.P. · Inventors: Hazelton, Donald Ross; Puydak, Robert Chester; Shulman, Cindy Beth
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 dynamically vulcanized thermoplastic composition is provided which comprises a polymer blend of (a) a thermoplastic olefinic resin, such as non-elastomeric ethylene vinyl acetate copolymer; (b) an elastomeric ethylene vinyl acetate copolymer having a relatively higher vinyl acetate content; and (c) a specified elastomeric copolymer, such as halobutyl rubber EPDM, or, a halogenated copolymer of a C4 to C7 isomonoolefin and a para-alkylstyrene. Halogenated polyethylene may also be incorporated in the composition. The dynamically vulcanized thermoplastic composition is suitable for adhesion to polyvinyl chloride.
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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 August 20, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2013.
- 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
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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.