Heat shrinkable cylindrical laminated film
CA 1333269 C · Owner: Asahi Kasei Kabushiki Kaisha · Inventors: Matsumura, Daisuke; Ishio, Tadashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat shrinkable cylindrical laminated film having a polyvinylidene chloride type resin (I) as an oxygen gas barrier core layer, on the both surface side of which 1 or 2 resin layers are arranged respectively and consisting of 3 - 5 layers with total characterized, in that the cylindrical exterior surface resin layer on said layer (I) comprises a crosslinked polyolefin type resin layer (II) having a gel fraction x at the outermost layer of 25 - 70% by weight, a geld fraction y at the surface layer in the side of the layer (I) of 40% by weight or less and a gradient of gel fraction represented by y/x of 0.6 or less and the joint of said layers (I) and (II) comprises a laminate of a joint in …
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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
- Granted November 29, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 29, 2011.
- 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.