Joist
CA 1045348 A · Owner: Anthes Equipment Limited · Inventors: Burrell, Michael P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the type of joist having an upper chord in the form of an inverted top-hat channel into which an insert is forced. The inner faces of the side walls of the channel converge towards one another at the top of the channel and the width of the bottom of the channel is greater than the width of the bottom of the insert.
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
- Granted January 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 1996.
- 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.