Impact resistant polycarbonate blend
CA 2000456 A1 · Owner: The Dow Chemical Company · Inventors: Laughner, Michael K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Impact resistant polycarbonate blends which, may be extruded without pre-drying are prepared from an, aromatic polycarbonate an aromatic polyester, and a, polyalkyleneoxide rubber and optionally, a grafted, copolymer or mixture of grafted copolymers. These polycarbonate blends exhibit high impact resistance chemical resistance, temperature stability and excellent thermoplastic engineering properties, making them particularly suitable for producing molded plastic components. 36,983-F
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 October 11, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 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.