Wall retention system
CA 2201143 C · Owner: Equilbec, Michel · Inventors: Equilbec, Michel; Cote, Jean; Cote, Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wall retention system for abutting against and retaining a mass of earth comprising in combination: (a) a set of flat facing slabs each facing slab , having an outer flat surface and an inner reinforced surface. The facing , slabs are edgewisely interlocked to form a single continuous wall structure. Foundation slabs abut on the ground, and support the lower portions of the facing slabs wherein the facing slabs are supported in generally upright condition. A number of elongated brace bars are provided integrally carried , at their inner ends by the facing slabs reinforced surface and transversely projecting therefrom at vertically spaced intervals. These tension members embeddingly …
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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 July 23, 1996 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2018.
- 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.