Oil recovery
CA 1332785 C · Owner: Yissum Research Development Company Of The Hebrew University Of Jerusale M · Inventors: Gatt, Shimon; Barenholtz, Yechezkel; Harnoy, Gideon N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of recovering a petroleum from an underground source thereof comprising injecting into said underground source a petroleum displacement agent comprising a fluid and a modified liposome said, liposome being present in an amount sufficient to lower the interfacial tension between said fluid and said petroleum to below about 10 millidynes and the displacement agent.
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 November 1, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 1, 2011.
- 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.