Seat unit
CA 2117674 A1 · Owner: Hooker, Christopher John · Inventors: Hooker, Christopher John; Hooker, John Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seat unit includes a frame structure and a seat. A linkage assembly interconnects the frame structure and the seat for displacement of the seat relative to the frame structure between a lowered sitting position and a raised position to provide assistance for the person using the seat unit to stand up therefrom. The linkage assembly causes the rearward part of the seat to be raised by a greater distance than the front part so that the seat also tilts forwardly. First and second spring means urge the seat towards its raised position the spring means, being operable in combination to produce an overall spring force urging the seat towards its raised position with a spring force value which …
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 September 9, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2016.
- 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.