US PATENT SUBCLASS 524 / 64
.~.~.~.~ Asphaltene or maltene additive

Current as of: June, 1999
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524 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
59  DF  .~.~.~ Coal, bituminous additive, extract, or derivative thereof; or oil shale; or fatty still residue DNRM {10}
64.~.~.~.~ Asphaltene or maltene additive

DEFINITION

Classification: 524/64

Asphaltene or maltene additive:

(under subclass 59) Subject matter wherein the DNRM is asphaltene or a maltene additive.

(1) Note. It is recognized that asphaltene or maltene occur in asphalt and that therefor every asphaltene product would have these constituents. For purposes of this subclass, there must be an expressed desire to limit other than completely removed or increase or in some other way select that added material for its critical maltene or asphaltene content.

(2) Note. Asphalt is a collodial system which has a disperse phase and a continuous phase. The components of highest molecular weight, i.e., micelles constitute the disperse phase and are known as asphaltenes. The continuous or intermicellular phase represents the compounds of lower molecular weight and are called maltenes.