Abuse-resistant retortable packaging film having oxygen barrier layer containing blend of amorphous polyamide and semicrystalline polyamide
CA 2600522 C · Owner: Cryovac, Inc. · Inventors: Bekele, Solomon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A retortable multilayer packaging film has a crosslinked first outer layer which serves as a seal layer and product-contact layer and a crosslinked O2-, barrier layer. The O2-barrier layer comprises a blend of (i) from 50 to 95 weight percent, based on blend weight, of an amorphous polyamide with a glass transition temperature of from about 80~C to about 200~C and (ii) a semi-, crystalline polyamide. The semi-crystalline polyamide comprises at least one member selected from the group consisting of: (a) from 5 to 50 percent based , on blend weight, of PA-MXD,6/MXD,I; and (b) from 5 to 15 percent based on , blend weight, of a nucleated or non-nucleated polyamide having a viscosity number …
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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 March 16, 2006 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.