Sealed back pressure breathing device
CA 2425291 A1 · Owner: O'Rourke, Sam · Inventors: O'Rourke, Sam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hand-held breathing device (10) for use by patients having respiratory problems creates a sealed backpressure in the airways of the patient by creating resistance to exhalation. A peep valve (50) is mounted inside a hollow body (12), and a pre-set compression spring (40) is mounted between the valve (50) and an adjustable cap (24) or cam lever (78) in the main body (12) of the device (10). A pair of valve openings extend through the wall of the main body (12), one opening serving as an intake port (42) for inhaling of air by the patient and the second port (44) - for exhalation of carbon dioxide. An intake valve (60) is mounted inside the body (12) between a normally open end of …
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 October 24, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 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.