Secondary oil recovery
CA 2606596 C · Owner: Surrey Aquatechnology Limited · Inventors: Sharif, Adel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for injecting water into a subterranean petroleum-bearing formation for petroleum recovery, said method comprising: a) positioning a selective membrane (14) between an aqueous solution (18) and formation water (20) having a higher solute concentration than the aqueous solution (18) such that water, passes across the membrane (14) by osmosis to dilute the formation water (20) b) injecting the diluted formation water (22) into the petroleum-bearing formation, c) recovering formation water from the petroleum-bearing formation and d) using at least a portion of the recovered formation water in step a) .
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 5, 2006 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.