Stair support assembly
CA 2178785 C · Owner: The Victory Metalworx Company Inc. · Inventors: Wallace, Brent L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stair support device is provided for installation on the upper surface of an inclined stair stringer. The device is foldable from a sheet metal template so as to define right-triangular first and second spaced-apart verticals sidewalls positionable with their hypotenii along the stringer, the sidewalls being joined by an integral horizontal stair support surface. Preferably the device further includes at least one and preferably two generally right-triangular support webs extending downwardly from against the stair support surface positionable with their hypotenii, on the upper surface of the stringer thereby serving a load-bearing function between the stair support surface and 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 June 11, 1996 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 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.