Collapsible paperboard cup
CA 1074271 A · Owner: Somerville Belkin Industries Limited · Inventors: Zimmermann, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making a container that comprises a knock-down paperboard formation and a liquid proof liner wherein two containers are formed as a unit and then separated by cutting along a line that is the edge of the containers. The liquid proof liner is glued to the paperboard base along the marginal area of the separating cut.
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 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 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.