Concrete block for elevating and retaining surfaces
CA 2314417 C · Owner: Graham, Gordon · Inventors: Graham, Gordon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A concrete block comprised of a horizontal rearwardly extending surface of a suitable elevation and a vertically extending surface that extends an appropriate height above the horizontal surface whereby the present invention allows for the association of vertical and horizontal structures and for the construction of aesthetically pleasing elevated surfaces and platforms decorative steps and various stair and riser systems.
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 July 25, 2000 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2022.
- 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.