Tube expanders

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders > Tube expanders

CPC:

Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating ( riveting B21J; uniting components by forging or pressing to form integral members B21K25/00; welding B23K; press-fitting, force-fitting, or shrinking in general B23P11/00, B21D19/00; by adhesives F16B11/00 ); Tube expanders > Tube expanders

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

B21D 39/10 with rollers for expanding only IPC+CPC Available in IPC and CPC
B21D 39/12 with rollers for expanding and flanging IPC+CPC Available in IPC and CPC
B21D 39/14 with balls IPC+CPC Available in IPC and CPC
B21D 39/16 with torque limiting devices IPC+CPC Available in IPC and CPC
B21D 39/18 Rollers of special shape IPC+CPC Available in IPC and CPC
B21D 39/20 with mandrels, e.g. expandable since 1974 +1 CPC IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL 2,318
JFE STEEL JP 2,294
POSCO (POHANG IRON AND STEEL COMPANY) KR 2,083
NIPPON STEEL CORPORATION JP 1,650
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,631
SMS GROUP DE 1,472
BAOSHAN IRON & STEEL COMPANY 1,181
SGCC(STATE GRID CORPORATION OF CHINA) 1,079
ANHUI JIANGHUAI AUTOMOBILE 984
HYUNDAI STEEL COMPANY KR 980

Top Applicants (CPC)

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL JP 2,667
NIPPON STEEL CORPORATION JP 2,049
POSCO (POHANG IRON AND STEEL COMPANY) KR 1,967
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,800
SMS GROUP DE 1,538
JFE STEEL 1,150
ARCELORMITTAL LU 1,142
BAOSHAN IRON & STEEL COMPANY 821
HYUNDAI STEEL COMPANY KR 808
THYSSENKRUPP STEEL EUROPE DE 660