Truss arrangement
CA 1278697 C · Owner: Johnston, Ronald J. · Inventors: Johnston, Ronald J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention discloses a new concrete forming system and components therefor. An upright member for the truss comprises two hollow members disposed in parallel relation and of a shape for telescopically receiving extension legs or the like. The members are connected by web means. Each member includes generally opposed parallel bearing surfaces with each bearing surface on one member being colinear with a bearing surface on the other hollow member.
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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- 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.