(under subclass 265) Products or processes in which the compound or nonmetallic element has a crystalline form and the substance serves to attain a desired crystal shape or size or to prevent change of the desired shape or size.
SEE OR SEARCH CLASS
23, Chemistry: Physical Processes,
295+, for processes of crystallization which involve no chemical reaction, in particular, subclasses 300+ for those processes in which an additive is employed.
