Method and apparatus for forming a t-shaped slot in a sheet material
CA 2179253 C · Owner: Chiodo, Peter · Inventors: Rudnisky, Walter; Chiodo, Peter; Uhlemann, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus is described for forming a T-shaped slot a sheet of material. The sheet of material is clamped to a top surface of an arbor. The arbor has a uniform T-shaped cross section having two undersides of the T-shape. The sheet of material is first formed into an inverted U-shape and then the sheet of material is bent to conform to the undersides of the arbor forming the T-shaped slot. The arbor is withdrawn from an open end of the formed T-shaped slot.
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 17, 1996 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2018.
- 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.