| 528 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {23} |
| 480 | DF | .~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT {14} |
| 491 | DF | .~.~ Contacting with organic material {5} |
| 497 | | .~.~.~ Hydrocarbon {1} |
| 498 | DF | .~.~.~.~> Acyclic |