Rubber composition adhesive, the process thereof and items comprising this adhesive
CA 2354655 C · Owner: Isnard, Roger · Inventors: Viegas, Nathalie; Isnard, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an adhesive usable at ambient temperature to bond together two cross-linked rubber compositions to a process for preparing the adhesive to a tread of a tire cover and to such a cover comprising this adhesive and to an article comprising two parts bonded together by means of this adhesive. An adhesive based on a copolymer comprising urea or urethane and isocyanurate groups wherein the copolymer is a reaction product of: -a polyisocyanate comprising isocyanurate groups the polyisocyanate having a functionality equal to or greater than three -a functional polymer comprising an amine or alcohol group at each of its chain ends the functional polymer being …
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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 1, 2001 and granted October 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 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
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.