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} |
129 | DF | .~.~ With aldehyde or derivative {18} |
157 | .~.~.~ Aldehyde or derivative is ethylenically unsaturated |