| 526 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES | 
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| * | 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} | 
| 89 | DF | .~.~ Polymerizing in the presence of a specified material other than monomer {28} | 
| 90 | DF | .~.~.~ Material contains transition metal or compound thereof {15} | 
| 148 |  | .~.~.~.~ Contains two or more diverse non-transition elemental metals, different non-transition hydride compounds, different carbon to non transition metal compounds, or mixture thereof {3} | 
| 149 | DF | .~.~.~.~.~> At least one atom of As, Sb, or Bi, in elemental form or bonded to hydrogen or carbon atom | 
| 150 | DF | .~.~.~.~.~> At least one atom of Ge, Sn, or Pb in elemental form or bonded to hydrogen or carbon atom | 
| 151 | DF | .~.~.~.~.~> At least one atom of Group IIIA metal (Al, Ga, In, Tl) in elemental form or bonded to hydrogen or carbon atom {2} |