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DIFF Subgroup
B24B 31/02

involving rotary barrels

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is loose; Accessories therefor > involving rotary barrels

CPC:

Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor (abrasive blasting machines B24C3/26) > involving rotary barrels

Of 8 combined children, 5 exist in both systems.

3 codes are CPC-only extensions.

IPC defines codes here since 1985.

Child Classifications

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  • B24B 31/0206 CPC only CPC only
  • B24B 31/0224 CPC only CPC only
  • B24B 31/023 with tiltable axis since 1985 IPC+CPC Available in IPC and CPC
  • B24B 31/027 with additional oscillating movement since 1985 IPC+CPC Available in IPC and CPC
  • B24B 31/03 the workpieces being continuously-travelling since 1985 IPC+CPC Available in IPC and CPC
  • B24B 31/033 having several rotating or tumbling drums with parallel axes since 1985 IPC+CPC Available in IPC and CPC
  • B24B 31/037 having several rotating or tumbling drums with non-parallel axes since 1985 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B24,2013–2023, worldwide · Source: EPO PATSTAT

  1. DISCO ABRASIVE SYSTEM 3,084
  2. APPLIED MATERIALS US 1,570
  3. EBARA CORPORATION JP 1,393
  4. DISCO CORPORATION JP 1,368
  5. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,270
  6. EBARA CORPORATION 1,016
  7. FUJIMI JP 829
  8. ZHEJIANG UNIVERSITY OF TECHNOLOGY 804
  9. ROBERT BOSCH DE 803
  10. SAINT-GOBAIN ABRASIVES US 781

Top Applicants (CPC)

Class B24,2013–2023, worldwide · Source: EPO PATSTAT

  1. DISCO CORPORATION JP 2,092
  2. APPLIED MATERIALS US 1,813
  3. EBARA CORPORATION JP 1,804
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,329
  5. ROBERT BOSCH DE 863
  6. FUJIMI JP 858
  7. SAINT-GOBAIN ABRASIVES US 833
  8. EBARA CORPORATION 810
  9. SAINT-GOBAIN ABRASIVES FR 782
  10. DISCO ABRASIVE SYSTEM 735