Making an abrading tool, expressed as a process, material, or composition; which tool is comprised of randomly situated sharp edges of a mass of natural or manmade (synthetic) mineral crystals; or
A material or composition designed for an abrading purpose if not provided for elsewhere. In the definitions of this class, the term "material" or "composition" is intended to include an abrasive tool distinguished solely by the abrasive material or composition incorporated therein.
(1) Note. In general, a chemical compound which may be used as an abradant, or a method of preparing such a compound, is classified elsewhere on the basis of the compound or its method of preparation.
Patents having all claims limited to an abrasive material which is a chemical compound are included within this group of subclasses (Class 51), together with patents directed to abrasive materials comprising compositions having a plurality of ingredients and their methods of preparation.
An "abrasive" material expressed as a chemical compound is included within this class (Class 51). An "abrasive" material comprised of a composition of a plurality of ingredients or a method of preparation of such a composition is included herein.
REFERENCES TO OTHER CLASSES
The rules for determing Class placement of the Original Reference (OR) for claimed chemical compositions are set forth in the Class Definition of Class 252 in the section LINES WITH OTHER CLASSES AND WITHIN THIS CLASS, subsection COMPOSITION CLASS SUPERIORITY, which includes a hierarchical
ORDER OF SUPERIORITY FOR COMPOSITION CLASSES.SEE OR SEARCH CLASS
44, Fuel and Related Compositions,
643, for a match scratcher composition or structure.
100, Presses,
35+, for a method of compacting material not elsewhere provided for.
106, Compositions: Coating or Plastic, for a composition containing material intended to impart a coating to work, generally.
148, Metal Treatment, for a composition to remove material from metal by combined detergent and abrading action, and for a composition containing material intended to impart a coating to metallic work.
241, Solid Material Comminution or Disintegration,
291, for a comminuting member distinguished by the composition thereof.
252, Compositions, for a compositions having various specified special use, property, or function. The rules for determining Class placement of the Original Reference (OR) for claimed chemical compositions are set forth in the Class Definition of Class 252 in the section LINES WITH OTHER CLASSES AND WITHIN THIS CLASS, subsection COMPOSITION CLASS SUPERIORITY, which includes a hierarchical ORDER OF SUPERIORITY FOR COMPOSITION CLASSES.
260, Chemistry of Carbon Compounds, for a chemical compound under that class definition which may be used as an abradant. See (1) Note.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for a process of making an article which may be abrasive in nature involving molding within that class definition. 373, Industrial Electric Heating Furnaces, for a chemical compound under that class definition which may be used as an abradant. See (1) Note.
423, Chemistry of Inorganic Compounds, for a chemical compound under that class definition which may be used as an abradant. See (1) Note.
424, Drug, Bio-Affecting and Body Treating Compositions,
49+, for a dentifrice composition which may contain an abrasive; however, an abrasive composition for drilling teeth
is classified in this class (51).
427, Coating Processes, for a coating process, generally.
428, Stock Material or Miscellaneous Articles,
687, for metallic stock having a rough surface and cross-reference art collection 932 for such stock having an abrasive feature.
451, Abrading, for a process of or apparatus for using a tool made by the composition or method of Class 51.
508, Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral oil Compositions, for compositions with components having a lubricating function.
510, Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions, for compositions to remove material by combined detergent and abrading action.
520, -528, Synthetic Resins or Natural Rubbers, particularly Class 523, 149+, for a composition containing a synthetic resin having utility as a friction element or to a process of preparation thereof.