Building block
CA 2023754 C · Owner: Trudel, Conrad · Inventors: Trudel, Conrad; St-Ours, Pierre; Bergeron, Denis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The building block comprises spaced apart outer and inner concrete walls and a pair of tie members for interconnecting these two walls. Each tie member has a first T-shaped end embedded into the concrete of the outer wall. A solid and cubic body is made of wood and is fastened to a second end of each tie member. For that purpose, each body has a hole therein, and the second end of each tie member is forked to define first and second branches embracing a portion of the body and having respective free ends bent to penetrate the hole through its two ends respectively. The cubic body defines edges having a length equal to the thickness of the inner wall and, it is embedded in the concrete of …
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 August 22, 1990 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2012.
- 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.