Multiple component structural member
CA 2092809 C · Owner: Tube Technology Pty. Ltd. · Inventors: Goleby, Leslie David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel method is provided for the continuous formation of a structural member having at least one web element and at least one hollow flange element extending longitudinally of an edge of the web element. The method includes the, steps of cold roll forming a first continuous strip of metal to form the at least one, hollow flange element, the free edges of the hollow flange element being spaced to, form a continuous aperture therein. A second continuous strip of metal is then guided, between the free edges and at least partially into the aperture. The free edges are, then continuously fused to opposed faces of the web element by high frequency electrical induction welding, or by …
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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 September 25, 1991 and granted November 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2013.
- 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.