Ventilator with dual gas supply
CA 2424358 A1 · Owner: Hansen, Gary L. · Inventors: Hansen, Gary L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of pressure regulation and a ventilator are provided. The ventilator (200) includes a positive relative pressure gas supply (204) a negative , relative pressure gas supply (206) and a diverter valve (211). The diverter valve (211) includes a positive pressure port (303) connected to the positive relative pressure gas supply (204), a negative pressure port (305) connected to the negative relative pressure gas supply (206) and a gas supply port , (309) communicating with a gas delivery device (220 222). The ventilator , (200) preferably further includes a feedback sensor (229) that detects a gas supply difference between a gas supply and a predetermined gas supply and generates …
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 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 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.