| 523 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {1} |
| 1 | DF | .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71} |
| 105 | DF | .~.~ Nonmedicated composition specifically intended for contact with living animal tissue or process of preparing; other than apparel {7} |
| 106 | DF | .~.~.~ Contact lens making composition {2} |
| 107 | | .~.~.~.~ Silicon-containing organic polymer |