| 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} |
| 139 | DF | .~.~ Composition related to metal foundry molding or metallurgical furnace or process of preparing {6} |
| 145 |  | .~.~.~ Phenolic or amine or ketone condensate with aldehyde {2} |
| 146 | DF | .~.~.~.~> With or derived from carboxylic acid or salt thereof, or organic sulfur material |
| 147 | DF | .~.~.~.~> With or derived from organic hydroxyl group containing material containing eight or more carbon atoms |