Compositions specialized and designed for the treatment of mineral substances (including metal) by surface removal with chemical agents.
(1) Note. This and indented subclasses also provide for patents which in addition to a composition claim also contain a claim to a nominal process of treating material therewith (e.g., etching, contacting, etc.) even though the composition of the material treated is recited.
(2) Note. Compositions for "bright polishing" involving the production of a shiny, mirror-like or specular finish on metals are considered to involve surface removal for this and indented subclasses.
SEE OR SEARCH CLASS
8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers, for compositions used in dyeing fabrics for the chemical modification of the fiber or fabric to produce ornamental effects.
134, Cleaning and Liquid Contact With Solids,
2, 27, 28, 41, and 42 for processes for cleaning or pickling metals using an acid or alkali.
148, Metal Treatment,
6+, for forming of a coating on a metal surface by chemical reaction. 166, Wells,
307, and the subclasses there noted for well treating methods which include materials which etch the formation.
205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,
210+, 221, and 223 for etching processes combined with electrolytic coating and subclasses 640+ and 687+ for electrolytic etching processes without formation of an electrolytic coating.
216, Etching a Substrate: Processes, for etching processes. Any detail of a treating step, e.g., dipping, spraying, etc., is sufficient to render an etching process more than nominal,
and to place the patent in Class 216.
510, Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions, for compositions used to clean a solid surface by removal of foreign matter and not involving the removal of the surface, per se, especially
245+, for bare metal surface cleaning compositions.
