Rubber composition comprising as coupling agent a polyfunctional organosilane
CA 2425330 A1 · Owner: Michelin Recherche Et Technique S.A. · Inventors: Pagano, Salvatore; Tardivat, Jean-Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an elastomeric composition based on at least a diene elastomer an inorganic filler as reinforcing filler a polyorganosilane as coupling agent (inorganic filler/diene elastomer) bearing at least two functions designated X and Y capable of being grafted on the elastomer by function X and on the inorganic filler by function Y. The invention is characterised in that said function Y is a hydroxysilyl function (.ident.Si-OH). Preferably said organosilane is a hydroxysilane polysulphide the diene elastomer is selected in the group consisting of polybutadienes natural rubber, synthetic polyisoprenes butadiene copolymers, isoprene copolymers and the reinforcing inorganic …
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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 October 9, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2023.
- 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.