Process for preparing thermoplastic elastomer compositions and thermoplastic elastomer compositions
CA 2029907 C · Owner: Murakami, Norishige · Inventors: Murakami, Norishige; Shimizu, Shizuo; Murata, Kazuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The first process for preparing thermoplastic elastomer compositions provided in accordance with the present invention comprises feeding a mixture comprising (a) 90-40 parts by weight of peroxide crosslinking type olefin copolymer rubber, (b) 10-60 parts by weight of peroxide decomposition type olefin plastics (herein (a) and (b) are selected so that (a) + (b) becomes 100 parts by weight), and (c) 0-100 parts by weight of peroxide non-crosslinking type hydrocarbon rubbery substance through a hopper into a cylinder of an extrusion machine and feeding, simultaneously (d) a mineral oil type softener or (d) a, mineral oil type softener and (e) silicone oil through an inlet provided on the …
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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 July 10, 1990 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2012.
- 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.