Multilayer container
CA 2466451 C · Owner: Mitsubishi Gas Chemical Company Inc. · Inventors: Maruo, Kazunobu; Maruyama, Katsuya; Nanba, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The multilayer container of the present invention comprises an outermost layer an innermost layer and at least one intermediate layer interposed between the outermost layer and the innermost layer. Each of the outermost and innermost layers is mainly made of a thermoplastic polyester resin A produced by polymerizing a dicarboxylic acid component comprising 80 mol% or higher of terephthalic acid with a diol component comprising 80 mol% or higher of ethylene glycol. At least one of the intermediate layers is mainly made of a mixed resin B of a polyamide resin C and a polyamide resin D in a mixing ratio of 99.5/0.5 to 80/20 by weight. The polyamide resin C is produced by polymerizing a diamine …
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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 May 5, 2004 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2026.
- 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.