Expired Canadian patentCanada
Paperboard laminate
CA 1050872 A · Owner: International Paper Company · Inventors: Whillock, Allan A.; Yount, James W.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure An improved paperboard laminate for containers for bulk packaging liquids, syrups and pastes which includes a, layer of a high strength polymer film and which also may include a layer of aluminum foil.
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 March 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMarch 20, 1979
Term endedMarch 20, 1996
Patent numberCA 1050872 A
Classification (IPC)B32B1/02 +2 more
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.