Branched thermoplastic polycarbonates having improved protection against uv light
CA 1312404 C · Owner: Nising, Wolfgang · Inventors: Paul, Winfried; Scholl, Thomas; Nising, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo2950, LeA 24,568, BRANCHED THERMOPLASTIC POLYCARBONATES HAVING IMPROVED PROTECTION AGAINST UV LIGHT, ABSTRACT OF THE DISCLOSURE This invention relates to a thermoplastic composition having improved resistance to UV-light containing a branched thermoplastic polycarbonate resin and an additive amount of a hydroxybenzotriazole corresponding to the following general formula (I):, (I), Mo2950
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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
- Granted January 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 2010.
- 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.