Resin compositions
CA 2005772 A1 · Owner: Monsanto Europe S.A. · Inventors: Pierre, Jean; Dufour, Daniel L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a polycarbonate composition having present therein particles of a rubber grafted with an ethylenically unsaturated aromatic monomer and either acrylonitrile or methacrylonitrile, which is characterised in that the particles have an average size of from 20 to 300 nm before being blended with the polycarbonate and agglomerate during blending to form aggregates of an average size of 500 to 10.000 nm. The composition can be injection moulded to produce a moulding wherein the aggregates substantially retain their identity and which has a surface of matt appearance.
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 December 18, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2011.
- 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.