Packaging container provided with an indication for opening
CA 2061029 C · Owner: Tetra Pak Holdings S A · Inventors: Rosen, Ake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a packaging container of the type which is produced by mechanical treatment for shaping of a strip of flexible packaging material and which for the purpose, of making the packaging material easy to open has a, tearing mark located in the wall of the container the, tearing of which entails that a part of the wall delimited, by the tearing mark, can be detached or torn off completely to expose a corresponding opening through which the packaging container can be emptied of its contents. The packaging container comprises a packaging material having a skeletal layer of plastic and filler mixed into the plastic to an amount of between 50 and 80% of the total weight of the skeletal …
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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 February 11, 1992 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2014.
- 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.