Method for separating gases
CA 1104067 A · Owner: Monsanto Company · Inventors: Null, Harold R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for the separation of gases by selective membrane diffusion or permeation by means of plural stages of membrane separation without increasing the work required by directing a permeant mixture from a second or later stage of separation to a recycle stage of membrane separation to provide a permeate enriched in the desired gas or gases and blending said permeate with the gaseous feed to said second or later stage of separation.
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 June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.