(under subclass 374.1) Apparatus comprising a ceramic material.
(1) Note. For the purpose of this classification, a ceramic material is an inorganic composition which may be either thermoplastic, such as a glass, or thermosetting, such as a refractory composition, frequently, although not necessarily, made of a mixture of metallic oxides and/or silicates, or baked clay-like substances. All substance defined in Class
501, Compositions: Ceramic, as being ceramic are herein contemplated. Thus, e.g., apparatus made of a composition comprising primarily carbides or nitrites would be included herein.
