Apparatus for high oxygen concentration measurement using limiting current oxygen sensor
CA 2215875 C · Owner: Carleton Life Support Systems Inc. · Inventors: Cao, Tuan Quoc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas analysis apparatus using multiple orifices of preselected sizes to attain a calculated gas mixing ratio for diluting an oxygen sample to a concentration less than 95% prior to application to a limiting current oxygen sensor. The apparatus comprises a regulator for regulating the pressures of incoming flows of air and oxygen sample to be measured a valve for allowing, the concentration of the air sample to oxygen sample to be measured, and a system for calculating the air sample/oxygen sample mixing ratio based on the known air sample concentration and then based on the known air concentration and calculated mixing ratio calculating the unknown sample concentration from the output of …
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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 September 18, 1997 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2019.
- 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
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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.