| 528 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {23} |
| 271 | DF | .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10} |
| 332 | DF | .~.~ With organic amine, or from organic amine salt of a carboxylic acid {2} |
| 350 | DF | .~.~.~ From carboxylic acid having three or more carboxylic acid groups or derivatives thereof, and an organic amine, or from an organic amine salt of a tri-or higher carboxylic acid {3} |
| 352 | | .~.~.~.~ Phosphorus- or sulfur-containing reactant |