Therapeutic household bed mattress
CA 2074223 A1 · Owner: Levesque, Gilles M. · Inventors: Guay, Yvan R.; Levesque, Gilles M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A covering for bed mattress comprising a plastic foam layer and a quilted layer superposed on the foam layer and a plurality of flat permanent magnetic bans adheringly mounted under the foam layer. The magnetic bands are located at predetermined distances from each other and are made of permanent fine magnetic particles embedded in a rubber-like flexible thermoplastic binder. The layers have a total thickness of about 2 to 5 inches and the magnets have an induction of about 1250 to 3850 gauss. The magnetic bands are disposed along a plurality of parallel rows and the magnetic bands of each row are disposed in staggered relationship with the magnetic bands of adjacent rows. The magnetic …
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 July 20, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 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.