Can ends
CA 2070125 A1 · Owner: Cowling, Gregory Justin · Inventors: Cowling, Gregory Justin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Can Ends, A method of forming a can end having a seaming panel 30, a chuck wall 32, and a central panel 17; the central panel being connected to the chuck wall by an outer anti-peaking bead 27 and the can end having one or more flexible beads 24,25 located concentrically within the outer bead, the method comprises the steps of: a) in a first stage, drawing a preliminary cup having a seaming panel, a chuck wall and a central panel and forming the inner beads by pressing the central panel between upper and lower profiled tools 15,16; and b) in a second stage, clamping the seaming panel and the central panel and moving them towards one another to form the outer bead 27 by deformation of …
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 June 1, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2014.
- 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.