Process for the extraction of crude oil from an underground deposit using surfactants
CA 1314703 C · Owner: Luders, Harald · Inventors: Luders, Harald; Balzer, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
23443-360, Abstract of the Disclosure, Disclosed is a process for the extraction of crude oil from an underground deposit using surfactants. Mixtures of alkyl (poly)glycosides and conventional co-solvents are used as the surfactants. The alkyl (poly)glycosides have the formula: R - O - Zn (I), (in which R is a linear or branched saturated or unsaturated, aliphatic hydrocarbon radical Z is a hexose or pentose unit, and, n is a number on average of 1 to 10). Crude oil can be efficiently extracted even from deposits whose salinities and temperatures vary widely.
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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 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
- 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.