Paper container and stopper applying apparatus for paper containers
CA 2136116 C · Owner: Dai Nippon Printing Co. Ltd. · Inventors: Okamoto, Hidehiko; Okushita, Masataka; Kajiura, Masayo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paper container according to the prsent invention includes a tab region half cut for defining a tab region of a shape whose lower part is closed and whose upper part is opened in the substantially central part of one of top folded-in side panels. A stopper is applied to an upper end of the tab region or near the upper end. The tab region is pulled from below after a pair of top folded-in side panels are separated apart, whereby a tab is formed and the tab is pulled to split the seal between the top ribs and then the top folded-in ribs, and then the seal is opened. The tab region half cut is simply provided and, a stopper is simply provided for prohibiting breakage of the tab. The tab is …
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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 November 18, 1994 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2016.
- 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.