US PATENT SUBCLASS 208 / 273
.~.~.~ With subsequent treatment of the oil

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}
273.~.~.~ With subsequent treatment of the oil {2}
274  DF  .~.~.~.~> Organic treating agent
275  DF  .~.~.~.~> Solid absorbent

DEFINITION

Classification: 208/273

(under subclass 266) Processes wherein the acid treatment is

combined with a subsequent nonconversion treatment of the sulfuric acid refined oil.

SEE OR SEARCH THIS CLASS, SUBCLASS:

222, for processes of acid desulfurizing a mineral oil combined with the treatment of the desulfurized oil.