(under subclass 1) Subject matter under Class 520, ... involving polymers derived from a boron- containing reactant or process of polymerizing; polymerizable compositions containing a boron-containing reactant or processes of preparing.
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4, for a boron-containing reactant wherein a boron atom is bonded to at least one atom of hydrogen or carbon.
480+, for processes of preparing a polymer not involving a chemical modification of the polymer, by the addition of a material thereto, and for chemically modifying material other than the polymer. Subclasses 480+ also provide for processes of admixing with a broadly claimed nonreactant material.
