Gas tight polypropylene peel film
CA 2471950 C · Owner: Boegels, Eric · Inventors: Rosseau, Patrick; Boegels, Eric; Veys, Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is related to a coextruded multilayer polyolefin film being heat sealable and peelable onto polypropylene based substrates of at least 3 layers, comprising at least a peelable top layer at least an , intermediary layer and at least a base layer characterised in that at least , one of the intermediate layers comprises an easy lowable low melting polymer with a melt flow index at least equal or higher than the melt flow index of the base layer, said easy flowable polymer representing at least 60% by weight of the total weight of said multilayer polymer film.
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 February 6, 2003 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2025.
- 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.