IPC Main Group
B22F 3/00 Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
Introduced: September 1968
Last revised: January 2021
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- CASTING; POWDER METALLURGY
- Subclass:
- WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
10 direct subcodes
Child Classifications
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- B22F 3/02 Compacting only
- B22F 3/1 Sintering only
- B22F 3/115 by spraying molten metal, i.e. spray sintering, spray casting
- B22F 3/12 Both compacting and sintering
- B22F 3/17 by forging
- B22F 3/18 by using pressure rollers
- B22F 3/2 by extruding
- B22F 3/22 for producing castings from a slip
- B22F 3/23 involving a self-propagating high-temperature synthesis or reaction sintering step
- B22F 3/24 After-treatment of workpieces or articles
Top Applicants
Top 10 applicants by patent filingsfor 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