US PATENT SUBCLASS 208 / 216 PP
.~.~.~.~.~ With specific porosity or pore volume

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}
209  DF  .~.~ With hydrogen {4}
213  DF  .~.~.~ With solid catalyst or absorbent {4}
216 R  DF  .~.~.~.~ With group VI metal or compound {1}
216 PP.~.~.~.~.~ With specific porosity or pore volume

Unofficial Alpha Subclasses: R PP

DEFINITION

Classification: 208/216

(under subclass 213) Processes wherein the solid catalyst or adsorbent comprises, a Group VI metal, (Cr, Mo, W or Po) or compound, thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

243, and 295, for other refining processes wherein Group VI metals or compounds thereof are used.