MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)

Introduced: September 1968

Description

B23C covers machine tools and processes for milling operations, including the removal of material from workpieces using rotating cutters with multiple cutting edges. This subclass encompasses milling machines (horizontal, vertical, and universal types), their design, construction, and control systems, as well as milling techniques and tool holders. It includes both conventional and specialized milling applications such as gear cutting, form milling, and profile milling, but excludes grinding and other abrasive finishing processes covered elsewhere in B23.

Title

Titles differ between systems:

IPC: MILLING

CPC: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)

Full Title

Full titles differ between systems:

IPC:

MILLING

CPC:

MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)

CPC subdivides this area 4x more granularly than IPC with 17 additional codes.

17 codes are CPC-only extensions.

Note: 17 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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B23C 1/00 Milling machines not designed for particular work or special operations +3 CPC IPC+CPC Available in IPC and CPC
B23C 2200/00 Details of milling cutting inserts 2nd only +9 CPC CPC only CPC only
B23C 2210/00 Details of milling cutters 2nd only +26 CPC CPC only CPC only
B23C 2215/00 Details of workpieces 2nd only +16 CPC CPC only CPC only
B23C 2220/00 Details of milling processes 2nd only +17 CPC CPC only CPC only
B23C 2222/00 Materials of tools or workpieces composed of metals, alloys or metal matrices 2nd only +15 CPC CPC only CPC only
B23C 2224/00 Materials of tools or workpieces composed of a compound including a metal 2nd only +10 CPC CPC only CPC only
B23C 2226/00 Materials of tools or workpieces not comprising a metal 2nd only +15 CPC CPC only CPC only
B23C 2228/00 Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner 2nd only +10 CPC CPC only CPC only
B23C 2230/00 Details of chip evacuation 2nd only +2 CPC CPC only CPC only
B23C 2235/00 Details of milling keys 2nd only +12 CPC CPC only CPC only
B23C 2240/00 Details of connections of tools or workpieces 2nd only +7 CPC CPC only CPC only
B23C 2245/00 Details of adjusting inserts or bits in the milling cutter 2nd only +3 CPC CPC only CPC only
B23C 2250/00 Compensating adverse effects during milling 2nd only +5 CPC CPC only CPC only
B23C 2255/00 Regulation of depth of cut 2nd only +3 CPC CPC only CPC only
B23C 2260/00 Details of constructional elements 2nd only +14 CPC CPC only CPC only
B23C 2265/00 Details of general geometric configurations 2nd only +6 CPC CPC only CPC only
B23C 2270/00 Details of milling machines, milling processes or milling tools not otherwise provided for 2nd only +10 CPC CPC only CPC only
B23C 3/00 Milling particular work; Special milling operations; Machines therefor (milling gear-teeth B23F, ) +2 CPC IPC+CPC Available in IPC and CPC
B23C 5/00 Milling-cutters (for cutting gear-teeth B23F21/12) +2 CPC IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B23,2013–2023, worldwide · Source: EPO PATSTAT

ITW (ILLINOIS TOOL WORKS) US 3,407
FANUC JP 3,120
DISCO ABRASIVE SYSTEM 2,777
HAN'S LASER TECHNOLOGY INDUSTRY GROUP COMPANY 2,629
ROBERT BOSCH DE 2,468
FANUC 2,273
DISCO CORPORATION JP 2,267
GE (GENERAL ELECTRIC COMPANY) US 1,611
CHINESE ACADEMY OF SCIENCES 1,534
ISCAR IL 1,499

Top Applicants (CPC)

Class B23,2013–2023, worldwide · Source: EPO PATSTAT

ITW (ILLINOIS TOOL WORKS) US 3,642
DISCO CORPORATION JP 3,316
FANUC JP 3,111
ROBERT BOSCH DE 2,711
FANUC 2,163
GE (GENERAL ELECTRIC COMPANY) US 2,113
ISCAR IL 1,516
SIEMENS DE 1,459
LINCOLN GLOBAL US 1,433
KOBE STEEL JP 1,423