Purification of gases
CA 2291388 C · Owner: Golden, Timothy Christopher · Inventors: Schwarz, Alexander; Hsiung, Thomas Hsiao-Ling; Golden, Timothy Christopher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbon monoxide is removed from air prior to cryogenic separation of oxygen and nitrogen. Feed air is compressed and the heat of compression is used, without further heating to drive catalytic oxidation of CO to CO2 over a Pd and/or Pt on, alumina catalyst followed by adsorption of water initially present and then either, adsorption of hydrogen or oxidation of hydrogen to water and its removal by adsorption, along with carbon dioxide.
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 November 25, 1999 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2021.
- 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.