Compositions, methods, and apparatus for separating oxygen from a gaseous mixture
CA 2124674 C · Owner: Syammach, Mustafa A. · Inventors: Mackerell, Richard R.; Renlund, Gary M.; Syammach, Mustafa A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solid ceramic composition provides high oxygen ion conductivity and includes a metal oxide combined with multiple dopants. The oxide may, for example, include zirconia bismuth trioxide, thoria or halfnia. The dopant oxides are chosen such that they are of similar ionic radius to the oxide but such that they generally have different valences. It has been found that choosing the dopants such that they exist in the composition at specified ratios results in surprising ability to transport oxygen ions. Also disclosed are methods and apparatus for using the composition in removing oxygen and water from a mixture of gases. The doped ceramic composition (18) is formed into a tube (12) having …
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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 February 24, 1993 and granted January 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.