(under subclass 1) Subject matter under Class 520, ... involving polymers derived from an organic oxygen-containing reactant or processes of polymerizing; polymerizable
compositions containing as a reactant an organic oxygen-containing material or processes of preparing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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.
SEE OR SEARCH CLASS
520, Synthetic Resins or Natural Rubbers, see the Glossary for a definition of the term "organic compound".
