Polyolefin blends and pipe
CA 2508436 C · Owner: Yim, Gary · Inventors: Yim, Gary; Kazakov, Alexei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyolefin blend comprising: (a) from 30 to 80 weight % of a low molecular weight copolymer comprising from 85 to 100 weight % of ethylene and from 15 to 0 weight % of one or more C4-8 alpha olefins having a density from 0.953 to 0.965 g/cm3 and a melt flow rate (2.16 kg 190°C) from 0.1 to 20.0 g/10 minutes; and~ (b) from 70 to 20 weight % of a high molecular weight copolymer comprising from 85 to 99.9 weight % of ethylene and from 15 to 0.1 weight of one or more C4-8 alpha olefins having a density from 0.915 to 0.940 g/cm3 and a melt flow rate (21.6 kg 190°C) from 0.05 to 5.0 g/10 minutes said copolymer being prepared with a single site catalyst is useful in the preparation of pipe.
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 May 26, 2005 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.