| 523 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
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| * | 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} |
| 113 | DF | .~.~.~ Composition suitable for use as tissue or body member replacement, restorative, or implant {3} |
| 115 | DF | .~.~.~.~ Composition suitable for use as tooth or bone replacement, restorative, or implant {1} |
| 116 | DF | .~.~.~.~.~ Cement or filling composition {1} |
| 117 |  | .~.~.~.~.~.~ Radio- or X-ray opaque |