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} |
131 | DF | .~.~.~.~ Material contains boron atom {2} |
134 | | .~.~.~.~.~ Boron compound contains boron bonded to hydrogen or to carbon atom |