US PATENT SUBCLASS 208 / 286
.~.~.~ 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}
283  DF  .~ With alkali or alkali earth metal compound (except clays) {1}
284  DF  .~.~ Alkali metal compound {4}
286.~.~.~ With subsequent treatment of the oil

DEFINITION

Classification: 208/286

(under subclass 284) Processes combine with a nonconversion treatment of the mineral oil subsequent to the treatment with the alkali metal compound.