| 525 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
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| * | 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} |
| 55 | DF | .~.~ At least one solid polymer derived from ethylenic reactants only {25} |
| 242 | DF | .~.~.~ Polymer derived from ethylenic reactants only mixed with ethylenic reactant {21} |
| 267 | DF | .~.~.~.~ Including step of preparing a polymer in the presence of a specified material and in the absence of a preformed polymer derived from ethylenic reactant only {3} |
| 271 |  | .~.~.~.~.~ Specified material contains a Group IA atom in elemental form or bonded to hydrogen or carbon {1} |
| 272 | DF | .~.~.~.~.~.~> Contains an atom other than Group IA, C, or H |