Interengageable structural members
CA 2092810 C · Owner: Goleby, Leslie David · 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 method is provided for the manufacture of structural members which are adapted for telescopic edge-to-edge engagement with a like structural member. The, method includes cold roll-forming a structural member having an intermediate web, member and opposed closed hollow side flanges extending along opposite sides of the, web, the hollow side flanges being closed by welding the free edges thereof to respective, junctions between the intermediate web and the hollow flanges. A slotted aperture is, formed in at least one of the hollow side flanges the slotted aperture , extending between opposed ends of the hollow side flange parallel to the intermediate web. In addition, a, cold …
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 September 25, 1991 and granted May 29, 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.