US PATENT SUBCLASS 208 / 345
.~.~.~.~ At least one stage is under pressure

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

308  DF  FRACTIONATION {5}
340  DF  .~ Recovery of mineral oil from natural or converted gases {1}
341  DF  .~.~ By absorption and vaporization {4}
344  DF  .~.~.~ Plural absorption stages {1}
345.~.~.~.~ At least one stage is under pressure

DEFINITION

Classification: 208/345

(under subclass 344) Processes wherein at least one of the absorption steps is under a pressure greater than atmospheric pressure.