US PATENT SUBCLASS 208 / 238
.~.~.~ Hydrocarbon containing

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

177  DF  REFINING {23}
208 R  DF  .~ Sulfur removal (free or combined sulfur) {17}
237  DF  .~.~ With organic reagent {3}
238.~.~.~ Hydrocarbon containing

DEFINITION

Classification: 208/238

(under subclass 237) Processes wherein a hydrocarbon is employed.