Multi-chamber airbed
CA 2354295 A1 · Owner: Barnett, J. Patrick · Inventors: Shulte, Robert; Barnett, J. Patrick; Casto, Douglas R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-chamber airbed reduces the effect of weight movement by one or more persons, sleeping or sitting on the airbed. In the multi-chambered airbed of the present invention, there, are at least two chambers inside the airbed each chamber having its own air , valve and representing its own portion of the airbed. The chambers are completely sealed off from each, other by a barrier or septum within the airbed. Thus when one person shifts , his or her weight on the portion of the airbed over one chamber air does not flow to the other , chamber or portion of the airbed.
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 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2023.
- 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.