Laminate of a substrate and an extruded high density polyethylene layer
CA 2396256 C · Owner: Cooper-Standard Automotive Inc. · Inventors: Truskowski, John Walter; Sheets, James Patrick; Mertzel, Elaine Audrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminate (12) of an elastomeric substrate (18) and a high density polyethylene layer having certain properties is disclosed. The preferred high density polyethylene has a density of from 0.940 to 1.000 g/cm3, a melt index of less than 10 grams per 10 minutes under conditions of 190 °C and 2.160 kg load and 298.2 kPa and a melt index , of greater than 5 grams per 10 minutes under conditions of 190 °C and 21.6 kg load and 2,982.2 kPa pressure. The laminate (12) is particularly well suited for use in automotive seals.
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 January 3, 2001 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 2023.
- 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.