Limited mobility ladder
CA 2392413 C · Owner: De La Tour, Rene J. · Inventors: De La Tour, Rene J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ladder for people with limited mobility comprising a first frame member defining a first sidewall; a second frame member defining a second sidewall; a plurality of steps spanning between the first and second sidewalls from a first , level above the surface to the upper level substantially to the height of a wheelchair seat; handles positioned above each of the steps, so that a person is able to place one's hands on the handles and lift oneself up the first step and grasp the , next highest handles and lift to the next highest step until the person is able to move from the highest step onto the wheelchair seat. There is further provided a means for allowing each of the steps to …
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 4, 2002 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 2024.
- 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.