US PATENT SUBCLASS 208 / 276
.~.~.~ With nonwater additive

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

177  DF  REFINING {23}
265  DF  .~ With acids {4}
266  DF  .~.~ Sulfuric acid {7}
276.~.~.~ With nonwater additive {2}
277  DF  .~.~.~.~> Organic compound
278  DF  .~.~.~.~> Solid contact material

DEFINITION

Classification: 208/276

(under subclass 266) Processes in which an added material, other than water, is used along with the sulfuric acid.