(under subclass 34) Apparatus in which the material to be dispersed is a liquid and is contained or retained only in an element which comprises pores or foraminae throughout so as to be absorbent and permeable to hold the liquid therein.
(1) Note. In this group of subclasses, the liquid retaining means is reusable and may be saturated with liquid a plurality of times. This is contrasted with those self-sustaining materials which are themselves volatile and are expended. The latter type will be found in subclass 60.
SEE OR SEARCH CLASS
424, Drug, Bio-Affecting and Body Treating Compositions, especially
1.25, and 422+ for an impregnated base from which a material, with a Class 424 utility, may slowly diffuse.
