US PATENT SUBCLASS 508 / 111
.~ Processes of purifying or recovering used lubricant compositions, and purified or recovered products thereof

Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
111.~ Processes of purifying or recovering used lubricant compositions, and purified or recovered products thereof

DEFINITION

Classification: 508/111

Processes of purifying or recovering used lubricant compositions, and purified or recovered products thereof:

(under subclass 110) Processes which are directed to the chemical or physical treatment of used lubricant compositions of this class for the purpose of purification or recovery, or to lubricant compositions described in terms of a method of purification or recovery thereof after use.

(1) Note. To be classified herein, the process can not simply be for the purification or recovery of a mineral oil or hydrocarbon lubricating base. The composition whose purification or recovery is desired must include at least one component that is not a hydrocarbon (except if the hydrocarbon is a solid synthetic polymer).

SEE OR SEARCH CLASS

208, Mineral Oils: Processes and Products, various subclasses, for the purification and recovery of mineral oils, per se.

585, Chemistry of Hydrocarbon Compounds,

800+, for the purification and recovery of mixtures of hydrocarbons that are neither mineral oils nor solid synthetic polymers.