Thermoplastic compositions based on a vinyl aromatic graft copolymer and a polyamide
CA 2046756 A1 · Owner: Ghidoni, Dario · Inventors: Fasulo, Gian C.; Ghidoni, Dario; Rossi, Anna G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermoplastic compositions endowed with improved mechanical characteristics, and particularly an improved impact resistance, especially when measured on test pie= ces having high thickness, comprising: (A) an impact resistant vinyl aromatic graft copolymer containing an amount comprised between 0.1 and 2% by weight of an ethylenically unsaturated compound having a carboxylic group or one of its derivatives in the molecule; and, (B) a polyamide resin.
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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 July 11, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.