A packaging laminate and a method of producing the same
CA 2122322 A1 · Owner: Tetra Laval Holdings & Finance S.A. · Inventors: Lundgren, Bo; Berlin, Mikael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A packaging laminate (10) including a rigid but foldable paper or, paperboard layer (11) which has at least on its one side, an outer film or coating (12) of a water-insoluble polysaccharide compound which imparts to the packaging laminate (10) tightness properties against liquid and water vapour and good sealing properties. Preferably the other side of the core, layer (11) also has an outer film or coating (13) of said polysaccharide compound. The polysaccharide compound in the two outer films or coatings (12 and 13) includes, on the one hand, a first water-soluble polysaccharide of polyanionic character and, on the other hand a second water-soluble, polysaccharide of polycationic …
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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 April 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2016.
- 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.