Pouring plug for liquid paper-containers
CA 2033282 C · Owner: Toppan Printing Co. Ltd. · Inventors: Nomura, Toshiaki; Kishikawa, Kenjiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a pouring plug used for paper containers filled with juice milk and the like. The present invention relates to a pouring plug having a flange portion corresponding to a peripheral surface portion of a fitting hole of a container body and being mounted from inside of the container body, in which a plurality of projecting portions are provided, at a height position larger than a thickness dimension of a structural member of the container body from the flange portion on the, peripheral surface portion corresponding to the inner peripheral edge of the fitting hole, whereby when the pouring plug is inserted and arranged in the fitting hole the, projecting …
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 December 27, 1990 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2012.
- 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.