| 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 | | .~.~ Contacting with organic material {5} |
| 492 | DF | .~.~.~> Nitrogen containing |
| 493 | DF | .~.~.~> Aldehyde or ketone |
| 494 | DF | .~.~.~> Ether |
| 495 | DF | .~.~.~> Alcohol {1} |
| 497 | DF | .~.~.~> Hydrocarbon {1} |