Modular cushion construction with foamed base
CA 2307969 C · Owner: Graebe, Robert H. · Inventors: Graebe, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modular cushion comprising a shaped base which has a flat rear portion and a raised front portion with angularly directed valleys and a raised pommel to direct weight to the thighs and in combination with a resilient pad positioned on the flat portion of the base to relieve pressure on the ischial and trochanters and in combination with a cover having a non-skid undersurface and a portion of the top being two-way stretchable. The resilient pad may be of inflatable cells having a pyramidal shape with a flattened top. A U-shaped restraining member may be positioned at the front of the base with upwardly projecting sides to retain the legs of the user.
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 7, 1992 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 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.