Aqueous surfactant systems for in situ multiphase microemulsion formation
CA 1097052 A · Owner: Phillips Petroleum Company · Inventors: Glinsmann, Gilbert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The optimum aqueous surfactant system for forming an efficient multiphase microemulsion system In situ is determined by comparing the behavior of oil from the formation to be flooded with the behavior of simple hydrocarbons in an equilibration test with a standard surfactant system. Thereafter salt concentration, equivalent weight of the sulfonate and/or alcohol solubility is varied based on criterion disclosed herein to arrive at the optimum system for recovery of the specific oil in question.
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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 March 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 1998.
- 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
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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.