The pro ladder set
CA 2415427 A1 · Owner: Archibald, Peter James · Inventors: Fougere, Robert Vincent; Archibald, Peter James; Fougere, Myles J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention generally relates to ladders and indicators and specifically to safe inclination, indicators for ladders. This invention is designed to indicate the optimal inclination of a ladder for, stability and is read from both the front and side of the ladder using a , pendulum control arm that, lines up with preset index markings at 75 1/2 degrees from the horizontal. Another object of our, invention is to provide a self-clamping device with a built-in safety release mechanism. A further, object of our invention is that it can be used on ladders of any length and it does not affect the, strength of the ladder.
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 January 8, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2025.
- 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.