US PATENT SUBCLASS 166 / 270.2
.~.~.~ Nonaqueous type

Current as of: June, 1999
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166 /   HD   WELLS

244.1  DF  PROCESSES {39}
268  DF  .~ Distinct, separate injection and producing wells {7}
270.1  DF  .~.~ Injecting a composition including a surfactant or cosurfactant {1}
270.2.~.~.~ Nonaqueous type

DEFINITION

Classification: 166/270.2

Nonaqueous type:

(under subclass 270.1) Surfactant or cosurfactant in which the fluid is a gas or a liquid not containing water.