| 524 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
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| * | 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} |
| 700 | DF | .~.~ Preparation of intentional or desired composition by formation of a solid polymer (SP) or SICP in presence of a designated nonreactant material (DNRM) other than solely water, hydrocarbon, silicon dioxide, glass, titanium dioxide or elemental carbon, composition thereof; or process of treating or composition thereof {23} |
| 714 | DF | .~.~.~ N-containing organic compound excluding unsubstituted ammonium as sole nitrogen in DNRM {10} |
| 717 | DF | .~.~.~.~ Heterocyclic structure other than per se N-alkyl pyrrolidone {1} |
| 718 |  | .~.~.~.~.~ Hetero nitrogen {2} |
| 719 | DF | .~.~.~.~.~.~> Containing hetero chalcogen DNRM |
| 720 | DF | .~.~.~.~.~.~> Plural hetero N, i.e., same or different ring |