Process for recovering sf6 from a gas
CA 2237748 C · Owner: Meimari, Magdy · Inventors: Meimari, Magdy; Li, Yao-En
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for recovering SF6 from a gas is provided. The process includes the step of contacting a gas stream comprising SF6 and at least one of N2, O2 CO2, and H2O with, a membrane in at least one membrane separation unit at conditions effective to obtain a retentate stream rich in SF6 and a permeate stream rich in at least one of N2 O2, CO2, ancL H2O. A process for forming solidified Mg metal is also provided. The process includes recovering and/or recycling of SF6 and/or CO2.
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 May 14, 1998 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2020.
- 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.