Container closure and method for producing same
CA 2071938 C · Owner: Polystar Packaging Incorporated · Inventors: Roth, Donald J.; Heyn, William M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closure (10) for a container (32), and a method for producing the same, wherein the closure comprises an end panel (24) and a plastic frame member (12) connected together and which can be placed over, or snapped onto and, then the frame member can be permanently attached and hermetically sealed to the flange of a metal glass, plastic, or composite container or can. The interface of the end panel (24) and frame member (12) is such as to hermetically seal the container and yet the end panel can be readily peeled from at least a portion of the frame member for gaining access to the interior of the container. A pull tab (26), or ring, is provided to assist in peeling the end panel to an open …
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
- Filed December 18, 1990 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2012.
- 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.