Stabilised polyketone composition
CA 2056101 A1 · Owner: Bp Chemicals Limited · Inventors: Davidson, Neil S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 7655(2), ABSTRACT OF THE DISCLOSURE STABILISED POLYKETONE COMPOSITION, A polymer composition stabilised against degradation during melt processing which comprises (a) a major amount of a polymer of carbon monoxide and at least one olefin (b) a minor effective amount of a first stabiliser comprising an aluminium trialkoxide an, aluminium phenoxide or an aluminium containing hydrolysis product of such compounds and (c) a minor effective amount of a second stabiliser comprising an organic epoxy containing compound. The aluminium trialkoxide is suitably aluminium isopropoxide and the organic epoxy containing compound is for example epoxidised soybean oil.
Read the whole patent
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, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2013.
- 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.