| 528 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {23} |
| 86 | DF | .~ FROM PHENOL, PHENOL ETHER, OR INORGANIC PHENOLATE {15} |
| 176 | DF | .~.~ With polycarboxylic acid or derivative as reactant {8} |
| 179 | DF | .~.~.~ Polymerizing in the presence of a specified material other than a reactant and other than Group IA or Group IIA material as sole metal atom {2} |
| 182 | | .~.~.~.~ Material is a nitrogen-containing compound |