| 526 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {8} |
| 72 | DF | .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43} |
| 242 | DF | .~.~ From fluorine containing monomer {7} |
| 250 | DF | .~.~.~ Fluorine containing monomer contains F, C and H only or F and C only {4} |
| 255 | | .~.~.~.~ Two or more fluorine atoms, e.g., vinylidene fluoride, etc. |