Novel pouches for packaging flowable materials in pouches
CA 2239579 C · Owner: The Dow Chemical Company · Inventors: Falla, Daniel James; Saavedra, Jose V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An environmentally friendly polymer film pouch (10 20) made from a , polyethylene film structure for the packaging of flowable materials for , example, milk. The film may be a monolayer or multilayer structure (30) such , as a two-layer or a three-layer coextruded film (30) containing at least one layer (31) of a blend of an ultra low density polyethylene and a high pressure low density polyethylene as a seal layer having high melt strength. Also disclosed is a process of making the pouch (10 20) for packaging flowable , materials using a film structure described hereinabove.
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 26, 1996 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2018.
- 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.