Opening arrangement for packages
CA 1236782 A · Owner: Aktiebolaget Tetra Pak · Inventors: Magnusson, Nils
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an opening arrangement for a package of the type which comprises a double-walled triangular lug communicating with the interior of the package and being connected to one lateral edge of the package and which comprises a sealing fin extending over the top side of the package and the said triangular lug. On both sides of the base line of the scaling fin parallel tearing perforation lines located opposite one another are provided which at a point on the top side of the triangular lug converge uniformly in an arc-shaped manner so as to extend over the lateral edges of the triangular lug and converging on the underside of the triangular lug without the said tearing …
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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
- Granted May 17, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2005.
- 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.