Tough monolayer shrink film for products containing moisture
CA 2020649 C · Owner: Bemis Clysar, Inc. · Inventors: Roberts, Richard Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blend of an ethylene-alpha olefin linear copolymer having a density of about 0.890 to about 0.915, an ethylene polymer selected from the group consisting of linear ethylene-alpha olefin copolymers having density of about 0.915 to about 0.940 and tubular log-density polyethylene, and a copolymer of ethylene with at least one copolymerized vinyl alkanoate, alkyl acrylate, or alkyl methacrylate provides a shrink film particularly useful for packaging e.g. fish or poultry.
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 July 6, 1990 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2012.
- 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.