(under subclass 174) Product wherein the nonplanar component (1) is so shaped as to form closed compartments, either vacant or occupied, the walls of which are an integral part of said nonplanar component or (2) cooperates with an adjacent component to produce closed compartments, which are either vacant or occupied by a material not integral with either component.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72+, for a sheet including a cover or casing in which there are elements which cooperate to form cells*.
166, for spaces between layers, one of which varies in thickness.
188, for a product which includes a longitudinal or transverse cavity* or cell*, in general.
