Continuous positive airway pressure device
CA 2479324 C · Owner: Lifevent Limited · Inventors: Shaw, Geoffrey Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous positive pressure device which includes an air reservoir connected to a delivery device (e.g. mask or mouthpiece) by an air supply hose; the reservoir includes a rigid protective housing and a plate which applies uniform pressure on the reservoir irrespective of its degree of inflation; the plate is connected to the housing by a non distorting and expandable frame which can expand or contract to permit movement of the plate only in a single plane, as the reservoir inflates or deflates.
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 April 9, 2002 and granted January 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2024.
- 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.