US PATENT SUBCLASS 523 / 518
.~.~.~ Bituminous, coal, or hydrocarbon other than benzene, toluene, or xylene or mixtures thereof DNRM

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ 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 {71}
500  DF  .~.~ Process of forming a composition of an ethylenically unsaturated reactant or ethylenically unsaturated polymer admixed with nonreactive material (NRM) and a polyester whose polymer backbone was derived through the direct formation of the ester linkage, e.g., polyethylene terephthalate, polycaprolactone, etc., or product thereof {17}
518.~.~.~ Bituminous, coal, or hydrocarbon other than benzene, toluene, or xylene or mixtures thereof DNRM

DEFINITION

Classification: 523/518

Bituminous, coal, or hydrocarbon other than benzene, toluene, or xylene or mixtures thereof DNRM:

(under subclass 500) Subject matter where the DNRM is bituminous, coal, or a hydrocarbon other than benzene, toluene, or xylene or a mixture other than of the specified excluded hydrocarbons.

(1) Note. The term bitumen refers to solid or semisolid materials which are often black or dark brown and which occur naturally or are obtained by refining petroleum or are the components of coal which are soluble in organic solvents. The term also applies generically to include natural and synthetic asphalts, tar, and pitches. For example, natural asphalts such as Trinidad, Bermuda, glisonite, grahamite and Cuban, etc. Petroleum asphalt may be used such as these obtained from California crudes, Smake over Arkansas crudes, Mid-Continental air-blown oils, Mexican petroleum asphalts, tarry residues known as cracked asphalts by-products during the cracking of gas, oil, or other heavier petroleum fractions to obtain gasoline or other lighter fractions, etc.

Further still, bituminous materials may be used such as coal tar, wood tar, petroleum pitches, and pitches obtained from various industrial processes such as a fatty acid pitch, etc.

(2) Note. Included within the subclass are oil shale or shale material from which oil has or has not been recovered as well as stearine pitch, coke products, coal tar and pitches.