| 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} |
| 280 | DF | .~.~ From fused or bridged ring containing monomer {2} |
| 281 | | .~.~.~ Bridged monomer {2} |
| 282 | DF | .~.~.~.~> Contains an exterior ethylenic substituent bonded to a single carbon atom of the bridged ring system |
| 283 | DF | .~.~.~.~> Compound containing dicyclopentadiene moiety |