(under subclass 1) Subject matter under Class 520, ... involving polymers derived from a hydrocarbon reactant or process of polymerizing; polymerizable compositions containing as a reactant a hydrocarbon material or processes of preparing.
(1) Note. A hydrocarbon contains only atoms of carbon and hydrogen.
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.
