US PATENT SUBCLASS 208 / 239
.~.~.~ Heavy metal soap 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}
239.~.~.~ Heavy metal soap containing

DEFINITION

Classification: 208/239

(under subclass 237) Processes wherein a heavy metal soap (heavy metal salts of higher fatty acid or naphthenic acid) is employed.