Liquefied gases using an air recycle liquefier
CA 1289455 C · Owner: Agrawal, Rakesh · Inventors: Auvil, Steven Ray; Agrawal, Rakesh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid nitrogen, oxygen and/or argon is produced from a cryogenic distillative separation efficiently and economically wherein at least a portion of the liquid air feed bypasses the distillation column and is used to liquefy the gaseous product of the column and the recycle air, stream resulting therefrom is retained at elevated 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
- Granted September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
- 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.