Oxygen monitoring devices
CA 2097456 A1 · Owner: Lahaye, Paul G. · Inventors: Seger, John L.; Lahaye, Paul G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oxygen sensor having a main body member with an interior chamber, made from material which is an oxygen ion conducting solid electrolyte when at specified temperatures. Electrodes made from material which is porous to oxygen molecules axe positioned opposite each other on the main body member within, the interior chamber and on the outside of the main body. Via a port which extends through the main body changes in the, absolute pressure of gas to be tested in the environs of the outer electrode are transmitted to the gas in the environs of the inner electrode. As a result of reference gas being introduced into the interior chamber of the main body through an orifice at a pressure …
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 June 1, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2015.
- 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.