Retortable pouch
CA 2361084 A1 · Owner: Sonoco Development, Inc. · Inventors: Bensur, Francis J.; Bailey, Irwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A retortable pouch for use with food products is disclosed. The retortable pouch includes at least one sheet made from a three-layer or four-layer laminate material. The laminate material includes an outer polyethylene terephthalate layer an , optional, nylon second layer, a metal foil third layer and a polypropylene inner layer. , A, solventless adhesive is used to bond the layers together. The retortable pouch is formed, by heat sealing the edges one of more sheets of the laminate such that the polypropylene, layers face inward and are welded together. The pouch and its contents can then be, pasteurized by heat-treatment without degradation of the laminate or the heat seal.
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 November 5, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 5, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2023.
- 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.