Process for the preparation of thermoplastic block elastomer copolymers derived from conjugated dienes and methyl methacrylate with improved heat resistance and products thereby

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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 November 26, 1993 and granted February 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2013.
• A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2015.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.