Packaging material for long-term storage of food products
CA 2109029 C · Owner: Sharps, Gordon Vincent, Jr. · Inventors: Mumpower, Edward Lee; Sharps, Gordon Vincent, Jr.; Grant, Barry Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic laminate suitable for long-term storage of food products includes a first substrate having a core layer of ethylene vinyl alcohol copolymer, two interior adhesive layers and two surface layers, each comprising a blend of a linear ethylene alpha olefin copolymer and an ethylene unsaturated ester copolymer; and a second substrate comprising an olefinic material of monolayer or multilayer construction and preferably, of substantiallly the same composition as the first substrate; and the second substrate bonded to the first substrate preferably by means of a conventional lamination adhesive.
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 October 22, 1993 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2015.
- 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.