Application of disubstituted ethylene-maleimide copolymers in rubber compounds
CA 2274369 A1 · Owner: Foltz, Victor J. · Inventors: Wang, Xiaorong; Foltz, Victor J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention teaches a method for enabling the formation of a high damping, compound. The method includes: reacting a poly(disubstituted ethylene-comaleic acid, anhydride) polymer with a primary amine under substantially dry conditions sufficient to form a, poly(disubstituted ethylene-co-maleimide) polymer plasticizer; and dispersing , the, poly(disubstituted ethylene-co-maleimide) polymer plasticizer within a rubber formulation to form, a relatively high damping compound.
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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 June 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2021.
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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.