Mattress foundation
CA 1059244 A · Owner: The Dow Chemical Company · Inventors: Southard, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a mattress foundation comprising in cooperative combination a synthetic resinous foam cushioning element having an upper surface and a lower surface and a support member in contact with at least a portion of the lower surface. The lower surface of the cushioning element has a plurality of corrugations in which the depth of the corrugation is from 40 to 95 percent of the thickness of the element. The cushion element containing the corrugations on the lower surface provides an improved load deflection curve for the mattress foundation resulting in a desired level of firmness and reduced stress on the mattress.
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
- Granted July 24, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 24, 1996.
- 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.