Tamper evident hinged lid carton
CA 1250553 A · Owner: Roberts, Douglas G. · Inventors: Roberts, Douglas G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hinged lid packet suitable for cigarettes having a tamper evident feature includes a lid portion hinged to a body portion and mating with the body portion to form a cuboid with substantially smooth surfaces; a collar portion within the packet extends from the body portion into the lid portion; a panel is connected to the collar portion along a frangible line and is secured, as by adhesive, to the inside of the lid portion; opening of the lid for the first time requires additional force to separate the panel from the collar along the frangible line; in this way it is evident to the user if the packet has been opened previously; when the packet is opened the panel remains secured to the lid …
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 February 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 2006.
- 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.