Composite closure having an insert with a peripheral curl
CA 2536867 C · Owner: Crown Packaging Technology, Inc. · Inventors: German, Galen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite closure (10) for a standard 40 mm opening is configured to form a cavity (40) to house a curl (52) of the insert disc. The shell (12) of the closure extends vertically to provide the cavity and a transition (36) of the , shell is thickened to provide strength for the shell's retaining ring. Employing a curl on the insert disc enables the insert disc to be formed of conventional coated steel. Because the channel of the retaining ring (30) is not semi-toroidal or like shape, the container may be formed by a blow trim process without an extra reaming step for preparing the internal portion of the container neck.
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 August 11, 2004 and granted November 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2026.
- 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.