| 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} |
| 266 | DF | .~.~ From monomer containing oxygen as part of a heterocyclic ring {5} |
| 270 | | .~.~.~ 5-membered heterocyclic ring compound contains at least one oxygen atom {1} |
| 271 | DF | .~.~.~.~> Acid anhydride {1} |