Package closure and package preparation
CA 2108562 C · Owner: Sig Combibloc Inc. · Inventors: Robichaud, Arthur W.; Miller, C. Daniel; Peterson, William B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closure (20) for opening and resealing a package (22) which includes a base (76) attachable to the top (30) of the package (22) over a scored area thereof, and a push-tab (98) device pivotally connected to the base (76) at a rearward portion (80) of the base (76) such that a user may depress an end of the push-tab (98) into the package (22) thereby creating a central opening area (42) in the package top (30). The push-tab (98) may be provided with a beak (112) and a vent hole (118). The package top (30) may be partially pre-cut or scored in such a way so as to open in the form of bomb bay doors (48, 50) when the push-tab (98) is depressed and rotated into the package (22). A cover …
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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 14, 1991 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2013.
- 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.