Mattress with high ild firm topper
CA 2253092 A1 · Owner: Barman, Bruce G. · Inventors: Barman, Bruce G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mattress employs a high density, high ILD convoluted polyurethane foam topper as a major transition layer over the supporting surfaces of an innerspring assembly in order to provide a smooth transition from the support characteristics of the padding and upholstery layers to the innerspring assembly. A high density, high ILD foam material of substantial thickness is positioned between a padding or insulating layer over the innerspring assembly and overlying upholstery, with convolutions in the high density transition layer oriented to extend away from the innerspring assembly. The high density transition layer dominates or masks the support characteristics of the innerspring assembly so …
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 November 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2020.
- 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.