Composite structural steel wall reinforced with concrete and mold therefor
CA 2121965 C · Owner: Mayrand, Paul · Inventors: Mayrand, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite structural steel wall reinforced with concrete and a form system is described herein. The wall comprises a corrugated steel sheet defining a plurality of integrally formed, alternately inverted spaced ridges. The ridges extend on opposed sides of the sheet and are separated by troughs defined by a rear face of the ridges on an opposite one of the sides and an integrally formed side wall of opposed ridges on a common side of the sheet. The side walls have openings therein. A first wall structure is secured to at least some of the ridges on one of the opposed sides of the corrugated steel sheet. A second wall structure is secured to at least some of the ridges on the other of the …
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 April 22, 1994 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2016.
- 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.