Rubber composition comprising a functionalised diene rubber, silica and an aliphatic compound
CA 2576366 C · Owner: Udagawa, Yoshiyuki · Inventors: Kobayashi, Naokazu; Udagawa, Yoshiyuki; Tadaki, Toshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A rubber composition comprising: (A) a rubber component including 30 to 100 mass% of diene rubber having at least one functional group selected from the group , consisting of an amino group, an alkoxysilyl group an epoxy group, a hydroxyl , group, and a carboxyl group in an amount of 0.01 to 5.0 mmol per 100 g of the diene rubber; , (B) silica in an amount of 5 to 130 parts by mass per 100 parts by mass of the rubber , component; and (C) an aliphatic component having at least one functional group selected from the group consisting of a carboxyl group a hydroxyl group, an , amino , group, and an epoxy group in an amount of 3 to 15 parts by mass per 100 parts by mass , of the silica. …
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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 3, 2005 and granted May 22, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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