A peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof
CA 2558103 C · Owner: Borealis Technology Oy · Inventors: Hojer, Lars; Gustafsson, Bill; Oderkerk, Jeroen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof are described. The pipe is characterised in that it comprises an ethylene polymer with a density of less than 950 kg /m3 obtained by polymerisation with a single-site catalyst and having a shear thinning index, SHI5/300 of less than 20 and a MWD of <10. The method is characterised in that it comprises polymerising ethylene optionally together with at least , one comonomer with a single-site catalyst to provide the above defined ethylene polymer, forming the ethylene polymer into a pipe by extrusion and crosslinking it.
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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 March 8, 2005 and granted July 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.