(under the class definition) Processes in which the work has a metallic, siliceous or calcareous base, and is subjected to a bleaching, oxidizing or reducing action, usually to remove color, dirt, or impurities or other foreign matter from the base.
SEE OR SEARCH CLASS
8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers,
101+, for processes of bleaching of other materials.
148, Metal Treatment,
6+, for the oxidation of solid metal to form an adherent coating.
502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making, especially
12, and 20+ for a process of removing contaminants, foreign or undesired matter from a catalyst or sorbent.
