| 528 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {23} |
| 370 | DF | .~ FROM REACTANT HAVING A HALOGEN ATOM OR OXYGEN SINGLE BONDED TO A CARBONYL GROUP, E.G., HALO-C(=O)-, -O-C(=O)-O, ETC. {2} |
| 372 | | .~.~ Reactant contains a halogen atom directly bonded to a carbon atom of a carbonyl group, i.e., halo-C(=O)- |