(under subclass 690) Mattress in which at least part of the mattress is composed of an expanded cellular substance having unconventional physical or chemical properties.
(1) Note. Since expanded cellular foams are conventional materials of construction for mattresses, classification in this subclass requires some inherently unconventional chemical or physical property of the foam, or the foam must have been modified by the addition of other materials to exhibit an unconventional physical or chemical property.
(2) Note. Unusual foam configurations can include the use of chunks, chips, layers, blocks, or unusual shapes and sizes of conventional foams, or an unusual aggregation, such as layering of conventional foams.
SEE OR SEARCH THIS CLASS, SUBCLASS:
655.9, for cushion-type supports comprising foam materials.
953, for body supports having unusual foam material or configuration.
SEE OR SEARCH CLASS 297, Chairs and Seats, digest 1 for chair- and seat-type devices that have foam components.
428, Stock Material or Miscellaneous Articles,
304.4+, for composite material having voids in a component.
