IPC Main Group
B21B 13/00 Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- ROLLING OF METAL
7 direct subcodes
Child Classifications
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- B21B 13/02 with axes of rolls arranged horizontally
- B21B 13/06 with axes of rolls arranged vertically
- B21B 13/08 with differently-directed roll axes, e.g. for the so-called "universal" rolling process
- B21B 13/14 having counter-pressure devices acting on rolls to inhibit deflection of same under load
- B21B 13/16 with alternatively operative rolls
- B21B 13/18 for step-by-step or planetary rolling
- B21B 13/22 for rolling metal immediately subsequent to continuous casting
Top Applicants
Top 10 applicants by patent filingsfor 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