Packaging laminates containing anti-block particles
CA 2521943 C · Owner: Harvey, Christopher J. · Inventors: Harvey, Christopher J.; Schell, Andrea M.; Bellile, Richard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention describes a flexible laminate suitable for use in packaging applications comprising a thermoplastic first substrate laminated to a second substrate. The thermoplastic first substrate includes a first exterior surface and an opposing second exterior surface at least a first polymeric layer comprising a plurality of anti-block particles. The thermoplastic first substrate has a total thickness of A the plurality of anti-block particles have a mean particles size B and a distribution of particle diameters C. Mean particles size, B and distribution of particle diameters C are such that either B, or at least 10% of C is at least 31 microns. The relative values of A B, and C …
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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 September 26, 2005 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.