Lower chord bearing cold-formed steel joists
CA 2667892 C · Owner: Strickland, Michael · Inventors: Strickland, Michael; Xu, Lei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lower chord bearing joist (20) comprises a lower elongate chord member (24) being cold-formed from a unitary piece of sheet steel the lower elongate chord member having a flange portion and a web receiving portion orthogonal thereto the web receiving portion having two web receiving tabs (46 48) and a pair of inner flange portions (45 47) each extending outward from one of the web receiving tabs respectively; an upper elongate chord member (22) wherein the upper chord member is generally the same length as the lower chord member; and a generally planar steel web (26) attached to the web receiving portion of the lower elongate chord member (24) between the two web receiving tabs (46 48) …
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 October 28, 2004 and granted July 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.