(under subclass 171) Subject matter wherein the liquid absorbing substance includes a naturally occurring, fine grained, earthy, hydrated aluminum silicate containing composition, i.e., clay.
(1) Note. Absorbent material in which clay serves only as a binder for the particles or is otherwise present in only minute quantities is excluded from this subclass.
(2) Note. The term "clay" includes materials commonly known as attapulgite, bentonite, fuller's earth, halloysite, illite, kaolinite, montmorillonite, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
172, for absorbent material wherein paper or a derivative thereof is present along with clay.
SEE OR SEARCH CLASS
502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making, particularly 80+, for a clay composition having sorbent characteristics and subclasses 400+ for a solid sorbent composition in general.
