B24D TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11)
Description
B24D covers abrasive tools and grinding wheels designed for material removal, surface finishing, and edge preparation operations. This subclass encompasses rotating wheels, stones, and mounted abrasives used in grinding machines, as well as honing and sharpening tools for cutlery and industrial implements. Included are various abrasive compositions, grain types, and bonding materials that affect tool performance and durability. Related grinding machine designs and their operational mechanisms are classified separately under B24B.
Filing statistics
CPC subclass B24D recorded 18,484 patent applications worldwide between 2013 and 2023. Annual filings declined from 1,532 in 2013 to 1,202 in 2023 (-22%), peaking at 2,154 applications in 2017. The most active applicants in class B24 are DISCO CORPORATION (2,092 applications), APPLIED MATERIALS (1,813 applications) and EBARA CORPORATION (1,804 applications).
Source: EPO PATSTAT, worldwide filings
12 direct subcodes
Child Classifications
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- B24D 11/00 Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D 13/00 Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D 15/00 Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D 18/00 Manufacture of grinding tools , e.g. wheels, not otherwise provided for
- B24D 2201/00 Bushings or mountings integral with the grinding wheel
- B24D 2203/00 Tool surfaces formed with a pattern
- B24D 2205/00 Grinding tools with incorporated marking device
- B24D 3/00 Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D 5/00 Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D 7/00 Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D 9/00 Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D 99/00 Subject matter not provided for in other groups of this subclass
Top Applicants
Top 10 applicants by patent filingsfor class B24, 2013–2023, worldwide · Source: EPO PATSTAT
- DISCO CORPORATION JP 2,092
- APPLIED MATERIALS US 1,813
- EBARA CORPORATION JP 1,804
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,329
- ROBERT BOSCH DE 863
- FUJIMI JP 858
- SAINT-GOBAIN ABRASIVES US 833
- EBARA CORPORATION 810
- SAINT-GOBAIN ABRASIVES FR 782
- DISCO ABRASIVE SYSTEM 735