Precast stair structure
CA 2491465 C · Owner: Acton, Ted · Inventors: Acton, Ted
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a precast stair structure comprising at least one support bracket for mounting onto a wall having a surface finish; at least one stair riser for mounting onto the support bracket. The invention further includes structure for incorporating the wall surface finish into an outer side of the support bracket this structure including a brick ledge defined in the support bracket for laying bricks or other surface finishes thereon.
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 24, 2004 and granted February 4, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.