Adhesive polyethylene compositions and multi-layer laminated films using the same
CA 2194820 C · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Tanaka, Haruhiko; Sawada, Yuji; Kawachi, Hideshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a specific adhesive polyethylene composition comprising 1 a modified ethylene/.alpha.-olefin copolymer resin or elastomer obtained by modifying a specific ethylene/.alpha.-olefin copolymer resin or elastomer each of which comprises ethylene and an .alpha.-olefin of 3 to 20 carbon atoms, with an unsaturated carboxylic acid or derivative thereof, 2 an unmodified ethylene/.alpha.-olefin copolymer resin and/or an unmodified ethylene/.alpha.-olefin copolymer elastomer and 3 a tackifier. Also disclosed is a multi-layer laminated film of 3 or more layers in which a layer of the above composition is interposed between an ethylene polymer layer and either a polyamide resin layer an …
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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 January 10, 1997 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.