527 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
* | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {6} |
200 | DF | .~ FROM PROTEIN OR BIOLOGICALLY ACTIVE POLYPEPTIDE REACTANT {4} |
201 | DF | .~.~ With ethylenically unsaturated reactant {2} |
202 | .~.~.~ Polymerization in the presence of a specified material |