Laminate and container therefrom
CA 1113369 A · Owner: Phillips Petroleum Company · Inventors: Morse, Clifford G.; Smith, Ernest L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminate comprising a substrate of paperboard first and second surfaces; a layer of frangible paper having first and second surfaces wherein said first surface of said frangible paper is bonded to said second surface of said papberboard; and a layer of frangible metal foil having first and second surfaces, wherein said first surface of said frangible metal foil is bonded to said second surface of said frangible paper; and wherein said laminate is so constructed that when a strip of material which has been securely bonded to the metal foil side of the laminate is pulled away from said laminate substantially all of the underlying laminate bonded to said strip will be severed substantially …
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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
- Granted December 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 1998.
- 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.