US PATENT SUBCLASS 524 / 65
.~.~.~.~ Coal derived additive, e.g., lignite, etc.

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}
65.~.~.~.~ Coal derived additive, e.g., lignite, etc. {1}
66  DF  .~.~.~.~.~> Tar or pitch

DEFINITION

Classification: 524/65

Coal derived additive, e.g., lignite, etc:

(under subclass 59) Subject matter wherein the DNRM is coal or a material derived therefrom.

(1) Note. Solid resin materials produced by subjecting coal tar distillate fractions to elevated temperature and pressure are not deemed to be resins for purposes of the Class 520 series of classes and therefore can be a DNRM when admixed with a solid polymer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

474+, appropriate subclasses for specific chemical compounds or mixtures which are coal derived.

498, through 612, for a solid polymer or specified intermediate condensation product in admixture with a hydrocarbon derived from coal and which hydrocarbon fails to meet the definition of subclasses 474+.