Wall form support system
CA 2110342 C · Owner: Au, Clarence Pangsum · Inventors: Wood, Charles Francis; Au, Clarence Pangsum
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to concrete forming structures and in particular to concrete wall forming structures and further to strongback members used to support, at a rear edge of a wall form the concrete wall, forming structure. The strongback provides horizontal support to exterior upright structural members and the strongbacks include cooperating tie plates associates with tie bars which typically pass through the concrete material. Preferably, the strongback is an extruded member of a channel-like cross section defined by a base with opposed flanges extending from the opposite ends of the base and to one side thereof. One of the flanges includes a slot arrangement which cooperates …
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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 November 30, 1993 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2015.
- 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.