Preparation of aromatic poly(imide-amide)s from co, primary diamine and di(trifluoro methane sulfonate) containing phthalimide group
CA 2087126 A1 · Owner: Blevins, Richard W. · Inventors: Turner, S. Richard; Blevins, Richard W.; Perry, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing poly(imide-amide)s comprising reacting carbon monoxide, an aromatic or heteroaromatic diamine, and an aromatic or heteroaromatic di(trifluoromethane sulfonate) in the, presence of solvent and a catalyst. One of the aromatic reactants has a nucleus including a phthalimide ring system. The catalyst is a compound of a metal selected from the group consisting of platinum palladium and nickel.
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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 January 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2015.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.