Breathable film for cheese packaging
CA 2323338 A1 · Owner: West, Michelle B. · Inventors: West, Michelle B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a heat shrinkable film for packaging high gassing cheeses, specifically Swiss-type cheeses. The film includes at least one barrier layer of a copolyamide having a melting temperature of less than about 150°C, preferably nylon 6/6.9 and, exhibits a CO2;O2 transmission ratio of at least 7.0 at 50% relative humidity. Furthermore, the film has a hot tensile strength at 85°C of at, least 1800 psi in at least one direction as measured by D882 and a percent elongation at 85°C of at least 120% in at least one direction as, measured by ASTM D882. Preferably, at least 50 percent by weight of the film is one or more ethylene copolymers preferably one or more, …
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 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2022.
- 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.