Tilt back chair and control
CA 2070592 C · Owner: Hon Industries Inc. · Inventors: Olson, Ogden R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tiltable chair has a base, a vertical post a, seat, a back and a chair control. The chair control comprises a housing attached to the vertical post a, resilient biasing means mounted in the stationary housing for biasing the chair in an upright position a seat, support structure, a back support structure and a back frame member. The seat support structure is pivotally connected to the housing at a pivot axis aligned over the vertical post. The back support structure is pivotally connected to the seat support structure at an axis forward of the vertical post. One end of the back frame member supports the back support structure while a mid-portion is interconnected to the seat support …
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 5, 1992 and granted August 12, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2014.
- 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.