US PATENT SUBCLASS 208 / 301
.~.~ With preliminary treatment of the oil

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

177  DF  REFINING {23}
299  DF  .~ With solid catalyst or absorbent {8}
301.~.~ With preliminary treatment of the oil

DEFINITION

Classification: 208/301

(under subclass 299) Processes combined with a nonconversion treatment of the mineral oil prior to the contacting with the solid catalyst or adsorbent.