Polycarbonate resin composition
CA 2066518 A1 · Owner: Idemitsu Petrochemical Co. Ltd. · Inventors: Kozakura, Shiro; Komatsu, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a polycarbonate resin composition which comprises, (a) a polycarbonate having a repeating unit (I) represented by the general formula (A):, ... (A), a repeating unit (II) represented by the formula (B): ... (B), and a trihalogenophenoxy group represented by the general formula (C):, ... (C), in the above formulae X1 to X7 are each a halogen atom), at the terminal of the carbonate; and a specified viscosity average molecular weight and the content of the repeating unit (I) and, (b) styrenic resin. The polycarbonate resin composition is excellent in mechanical properties, heat resistance flame retardance, thermostability, rigidity impact resistance, and fluidity.
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 April 21, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2014.
- 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.