| 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} |
| 78 | DF | .~.~ Adding material to an on-going polymerization reaction, said addition being other than the continuous addition of the initial charge {4} |
| 87 | | .~.~.~ Adding monomer |