(under subclass 690) Mattress disclosing the use of materials that are especially used to provide a thermal barrier between the user and the support of the mattress or the surrounding environment, for the purpose of minimizing heat loss from the user, thereby keeping the user warm.
(1) Note. While most material used in making mattresses have insulating properties, with insulating properties being a matter of degree, the materials used in the patents in this
subclass have been chosen especially for their insulating properties.
(2) Note. Patents that include thermally reflecting layers, such as metals or laminates, are included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
413, for sleeping bags that often include insulating materials.
420, for ground mats.
656, for supports used outdoors. 668, for waterbeds with insulating means.
698, for fireproof mattresses, that can include insulating materials.
948+, and especially subclass 949 for wool containing devices, subclass 950 for feather or down containing devices, subclass 952 for artificial fiber containing devices, and subclass 953 for foam containing devices.
