Purification of air
CA 2284351 C · Owner: Taylor, Fred William · Inventors: Golden, Timothy Christopher; Malik, Nasim Hassan; Raiswell, Christopher James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbon dioxide, water, nitrous oxide and optionally ethylene are removed from a, feed air stream by a temperature swing adsorption using a first adsorbent such as, alumina to adsorb water, a second adsorbent such as 13X zeolite to adsorb carbon, dioxide, and a third adsorbent such as binderless calcium exchanged X zeolite to adsorb, nitrous oxide and optionally ethylene prior to cryogenic separation of the , purified air stream.
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 1, 1999 and granted April 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 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.