Multilayer heat shrinkable film and wrapped battery
CA 2566479 C · Owner: Gunze Limited · Inventors: Morikawa, Akira; Okuda, Tomohisa; Wakai, Mutsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROBLEMS Disclosed is a heat shrinkable film having excellent heat resistance, content resistance, impact resistance low/high temperature cycle , resistance and wear resistance. MEANS FOR SOLVING PROBLEMS Specifically disclosed is a heat shrinkable film comprising an intermediate layer (1) a , front surface layer (2) and a back surface layer (3) so arranged as to sandwich the intermediate layer (1), and a overcoat layer (4) arranged on top of the front surface layer (2). The intermediate layer (1) contains a first cyclic olefin resin and a random copolymer of ethylene and another .alpha.olefin or a random copolymer of propylene and another .alpha.-olefin. The front surface layer (2) …
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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 13, 2005 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 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.