Weather-resistant polyacetal resin composition
CA 2071647 A1 · Owner: Katsumata, Toru · Inventors: Katsumata, Toru; Matsunaga, Nobuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A weather-resistant polyacetal resin composition being excellent in weatherability and has a reduced surface glossiness while maintaining good mechanical properties, high frictional wear resistance and good moldability inherent in polyacetal, which is produced by blending:, (A) 100 parts by weight of a polyacetal resin with, (B) 0.01 to 5 parts by weight of a weathering (light) stabilizer and, (C) 1 to 50 parts by weight of a core shell polymer consisting of a core of a, rubber-like polymer and a shell of a glasslike polymer comprising a vinyl copolymer having an oxygen-containing polar group and a molded product obtained therefrom.
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 June 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 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.