Container with an opening device
CA 1316130 C · Owner: Tetra Pak Holdings And Finance S.A. · Inventors: Andersson, Par Magnus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The container has a top wall which consists at least of a paper coated with plastic on both of its faces and has an opening device with a puncture line, along which the pouring spout can be torn open. In order to improve the pouring spout and the impermeability to gases of the container, it is provided according to the invention that at least at one location of the puncture line of grip means and a tearing-off means made of plastic are attached inside and outside to the paper. The tear-off means is preferably moulded into a hole in the top wall to have a crosssectionally rivet-like shape and has a ring acting as the grip means.
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
- Granted April 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
- 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.