Preparation of alternating olefin/carbon monoxide copolymers by means of a heterogeneous supported catalyst
CA 2091028 C · Owner: Lugli, Gabriele · Inventors: Sommazzi, Anna; Calderazzo, Fausto; Belli Dell'Amico, Daniela
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:, (a) Pd(O2CNEt2)2(NHET2)2 supported on a solid carrier preferably constituted by hydroxylated silica (b) an either mono- or bidentate ligand containing one or two nitrogen or phosphorus atoms capable of Linking to Pd atom by dative bonds, (c) a mineral or organic acid. Disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).
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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 March 4, 1993 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2015.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.