Nitrogen refrigerated process for the recovery of c2 + hydrocarbons
CA 2344488 C · Owner: Howard, Lee Jarvis · Inventors: Howard, Lee Jarvis; Rowles, Howard Charles; Roberts, Mark Julian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
C2 and C3 hydrocarbons, particularly ethylene and propylene are recovered , from, refinery or petrochemical plant gas mixtures by cooling and fractionating a feed gas, mixture containing these hydrocarbons and lighter components. Refrigeration for the, process is provided by a closed-loop gas expander refrigeration process cycle which, preferably uses nitrogen as the recirculating refrigerant. Cooling and fractionation may, be effected in a dephlegmator.
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 April 10, 2001 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2023.
- 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.