Connection for joining precast concrete panels
CA 2032894 C · Owner: High Industries, Inc. · Inventors: Baur, Kenneth C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A connection for joining upper and lower precast concrete panels includes a molded plastic tubular body having closed ends and recesses formed in the inside and outside of the body. The body is cast into the top of the lower panel with a sheet in place closing one end to prevent entry of water and debris into the interior of the body. When the panels are erected the sheet is, broken open exposing the interior of the body the body is filled, with grout and a structural rod extending down from the upper panel is lowered into the body as the upper panel is placed on the lower panel. Setting of the grout forms a strong connection between the two panels.
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 December 20, 1990 and granted April 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 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.