US PATENT SUBCLASS 208 / 289
.~ With nitrogen containing compound

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

177  DF  REFINING {23}
289.~ With nitrogen containing compound

DEFINITION

Classification: 208/289

(under subclass 177) Processes wherein mineral oil is treated with an added nitrogen containing compound.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206, for processes of sweetening mineral oils with nitrogen containing compounds in combination with an alkali metal hydroxide or carbonate.

207, for processes of sweetening mineral oils with nitrogen containing treating agents.

236, for processes of desulfurizing mineral oils with nitrogen containing treating agents.