Sheet material and method
CA 2570387 C · Owner: Elopak Gmbh · Inventors: Kieser, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A top closure obturating panel (2) of a carton is formed with a partial depth cut (4) in the form of an open loop of which one end (4a) is at a greater distance from a central zone of the loop (4) than is the other end (4b). Following filling and top-sealing of the carton there is applied to the panel , (2) a pour spout fitment consisting of a flanged pour spout a screw cap on , the pour spout, and a plunger co-operating with the screw cap and the pour spout in such manner that, upon unscrewing of the screw cap the plunger , screws inwards. At its inner end the plunger is formed with arcuate pushing blades (6), which thereby cause the laminate material of the panel (2) to fracture …
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 June 22, 2005 and granted April 15, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 22, 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.