Sintering only

Introduced: September 1968

Full Title

Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor > Sintering only

CPC subdivides this area 4x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

B22F 2003/1032 2nd only CPC only CPC only
B22F 2003/1042 2nd only +1 CPC CPC only CPC only
B22F 3/1003 +2 CPC CPC only CPC only
B22F 3/1017 +2 CPC CPC only CPC only
B22F 3/1035 CPC only CPC only
B22F 3/1039 CPC only CPC only
B22F 3/105 by using electric current , laser radiation or plasma (B22F3/11 takes precedence) since 1995 +4 CPC IPC+CPC Available in IPC and CPC
B22F 3/11 Making porous workpieces or articles since 1995 +5 CPC IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B22,2013–2023, worldwide · Source: EPO PATSTAT

GE (GENERAL ELECTRIC COMPANY) US 1,719
CHINESE ACADEMY OF SCIENCES 1,489
POSCO (POHANG IRON AND STEEL COMPANY) KR 1,248
TOYOTA MOTOR CORPORATION 1,043
SIEMENS DE 1,028
CENTRAL SOUTH UNIVERSITY 959
HEWLETT-PACKARD DEVELOPMENT COMPANY US 891
UNITED TECHNOLOGIES CORPORATION (UTC) US 786
UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING 769
JFE STEEL JP 761

Top Applicants (CPC)

Class B22,2013–2023, worldwide · Source: EPO PATSTAT

GE (GENERAL ELECTRIC COMPANY) US 2,157
HEWLETT-PACKARD DEVELOPMENT COMPANY US 1,633
SIEMENS DE 1,267
POSCO (POHANG IRON AND STEEL COMPANY) KR 1,124
CHINESE ACADEMY OF SCIENCES 1,040
UNITED TECHNOLOGIES CORPORATION (UTC) US 1,015
JFE STEEL JP 884
CENTRAL SOUTH UNIVERSITY 810
HITACHI METALS JP 641
SINTOKOGIO JP 624