Carton incorporating easily openable and reclosable aperture
CA 1078346 A · Owner: General Foods Corporation · Inventors: Andersen, Thomas S.; Grieve, Harold R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A carton is constituted of end wall and side wall panels, extensions on the panels forming top closure flaps and dust flaps, weakening lines being provided on the top closure flaps to define severable flap sections. One of the dust flaps is shaped in conformance with one of the top closure flap sections and is adhesively-bonded thereto so that severing of the, closure flap sections along the weakening lines will form a pouring aperture. The pouring aperture can be positively reclosed by tucking a free edge of the severable section of the outer top closure flap beneath a portion of the inner top closure flap.
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 May 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
- 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.