Composition of cyclic amine-initiated elastomers and silica and process for the production thereof
CA 2242797 A1 · Owner: Takeichi, Hideo · Inventors: Lawson, David F.; Oziomek, James; Takeichi, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The reduction of hysteresis in a silica-filled vulcanized elastomeric compound is, produced by mixing diene monomer and optionally monovinyl aromatic monomer with a lithium amine initiator and, optionally a modifier; effecting polymerization conditions; terminating polymerization with an amino group producing terminator to form an amine functionalized diene elastomer; compounding the amine functionalized diene elastomer will an amorphous silica filler and a vulcanization agent; and effecting vulcanization. A, pneumatic tire tread stock incorporating the vulcanized elastomer compound exhibits improved reduced hysteresis, or highly balanced wet traction rolling resistance, snow/ice, traction …
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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, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2020.
- 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.