US PATENT SUBCLASS 208 / 268
.~.~.~ White oil making

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}
268.~.~.~ White oil making

DEFINITION

Classification: 208/268

(under subclass 266) Processes for preparing highly refined or medicinal oils known as "white" oils.

(1) Note. The treatment removes organic impurities resulting in an oil of improved odor and color suitable for pharmaceutical or medicinal purposes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

263, for processes for the treatment of mineral oil to remove organic acids or phenolic impurities.