Use of membranes for ethylene recovery in polymerization processes
CA 1296483 C · Owner: Overman, Dana C. · Inventors: Glassford, Craig L.; Overman, Dana C.; Coan, Frederick L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for recovery of ethylene from a polymerization process is described. A specifically defined normally solid membrane is employed to recover an ethylene enriched gas stream from the polymerization vent gases, The ethylene enriched gas stream is recycled to the polymerization process.
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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.