Method and composition for providing repulpable moisture vapor barrier coating for flexible packaging
CA 2210984 C · Owner: Le Groupe Recherche I.D. Inc. · Inventors: Berube, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The composition comprises a polymer emulsion containing for example, polyvinylidene chloride having a particle size distribution finer than 10µ and an additive with generally the same size distribution for example aluminum silicate, calcium carbonate polyvinyl acetate polystyrene, polyacrylates in emulsion or powder form which is capable of interstitial combination with the polymer particles. The composition has a critical pH between about 2 and 7. The method of repulping coated packaging is also disclosed.
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 January 17, 1996 and granted May 15, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 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.