| 525 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
|
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {4} |
| 50 | DF | .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32} |
| 54.4 | DF | .~.~ Containing chemically combined natural resin or derivative thereof other than tall oil {3} |
| 54.42 | DF | .~.~.~ Previously formed solid polymer chemically reacted with natural resin or derivative {1} |
| 54.44 |  | .~.~.~.~ At least one previously formed solid polymer derived from ethylenic monomers only |