Compositions containing polycarbonate and grafted rubber having improved low-temperature toughness
CA 2357523 C · Owner: Spangler, Lora L. · Inventors: Janarthanan, Venkatarayaloo; Spangler, Lora L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic molding composition suitable for preparing molded articles having improved properties, most notably high ductility and impact strength at low temperature, is disclosed. The composition contains a resinous blend of aromatic polycarbonate and a mixture of at least two grafted rubbers. The mixture of grafted rubbers contains a "small-mode" component having a weight average particle size of less than 0.3 microns and a"large-mode", component having a weight average particle size of 0.3 microns or larger. The inventive composition is characterized in the absence of flaky filler , having an aspect ratio is at least 1.7 and particle size of 1-100 microns therefrom.
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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 September 20, 2001 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2023.
- 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.