|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

SHAPING

|  | B24 |
GRINDING; POLISHING

|  | B24 |
Note(s) In this class, the following term is used with the meaning indicated: "grinding" is used in its most general sense to mean machining and covers, in particular, "corrective" operations.

|  | B24B |
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth Fulltext... Hierarchy... Expanded...B23F, of screw threads Fulltext... Hierarchy... Expanded...B23G 1/36; by electro-erosion Fulltext... Hierarchy... Expanded...B23H; abrasive or related blasting Fulltext... Hierarchy... Expanded...B24C; tools for grinding, buffing or sharpening Fulltext... Hierarchy... Expanded...B24D; polishing compositions Fulltext... Hierarchy... Expanded...C09G 1/00; abrasives Fulltext... Hierarchy... Expanded...C09K 3/14; electrolytic etching or polishing Fulltext... Hierarchy... Expanded...C25F 3/00; grinding arrangements for use on assembled railway tracks Fulltext... Hierarchy... Expanded...E01B 31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS [2]

|  | B24B |
Note(s) In this subclass, the following term is used with the meaning indicated: "polishing" means the smoothing of a surface, i.e. a surface improvement but no improvement of the dimensional accuracy as would occur in a "grinding" operation. [4] Attention is drawn to Notes (1) and (2) following the title of subclass Fulltext... Hierarchy... Expanded...B23F. [4] In groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B24B 1/00-B24B 27/00, in connection with glass the terms "grinding" and "polishing" are treated as being equivalent. [4]

|  | B24C |
ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL

|  | B24C |
Note(s) This subclass covers: the use of a blast of any particles or pellets dispersed in air, gas, or liquid for the treatment of surfaces or cutting of materials, the particles usually being of abrasive material; the equivalent use of a jet of particles or pellets projected or energised by means other than a stream of air. In this subclass, the following terms are used with the meanings indicated: "abrasive" covers any material used in the manner mentioned in Note (1) above; "blast" covers any equivalent jet of material mentioned in Note (1) above.

|  | B24D |
TOOLS FOR GRINDING, BUFFING, OR SHARPENING (tools for grinding or polishing optical surfaces on lenses or surfaces of similar shape Fulltext... Hierarchy... Expanded...B24B 13/01; grinding heads Fulltext... Hierarchy... Expanded...B24B 41/00; manufacture of abrasive or friction articles or shaped materials containing macromolecular substances Fulltext... Hierarchy... Expanded...C08J 5/14; polishing compositions Fulltext... Hierarchy... Expanded...C09G 1/00; abrasives Fulltext... Hierarchy... Expanded...C09K 3/14)

|  | B24D |
Note(s) This subclass covers grinding tools for working on any material. Tools for grinding, buffing or sharpening, specially designed for a particular purpose, which purpose is provided for in a single other place, are classified in that place, e.g. Fulltext... Hierarchy... Expanded...B23F 21/02. [4]