Treatment of oil recovery process waste water
CA 1234764 A · Owner: University Of Waterloo · Inventors: Kim, Jae-Jin; Huang, Robert Y.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
21, Abstract of the Disclosure, Waste water from the steam recovery of bitumen from subterranean oil deposits is purified to enable it to be reused to generate further steam by reverse, osmosis using a thin-film composite membrane comprising gamma-irradiated sulfonated poly(2,6-dimethyl-1,4phenylene oxide) (SPPO). The invention is broadly applicable to the treatment of any waste water stream containing organic chemical- and dissolved mineralscontamination using any high energy irradiated thin-film composite SPPO membrane.
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 April 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 2005.
- 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.