Safety lock for a folding chair
CA 2191908 C · Owner: Liu, Lausan Chung Hsin · Inventors: Liu, Lausan Chung Hsin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety lock pivoted to a back frame, and a stand frame of a folding chair by a pivot and adapted for hooking on a headed locating pin at one side of a seat frame of said folding chair to secure said folding chair in an extended position the safety lock including a metal hook turned about the pivot and having a retaining notch adapted for hooking on the headed locating pin, and a rubber cap covered on the hook and turned with it about the pivot, having a retaining notch adapted for hooking on the headed locating pin and an inside recess adapted for receiving the head of the headed locating pin.
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 3, 1996 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.