IPC Main Group
B22D 27/00 Treating the metal in the mould while it is molten or ductile
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- CASTING; POWDER METALLURGY
- Subclass:
- CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
7 direct subcodes
Child Classifications
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- B22D 27/02 Use of electric or magnetic effects
- B22D 27/04 Influencing the temperature of the metal, e.g. by heating or cooling the mould
- B22D 27/08 Shaking, vibrating, or turning of moulds
- B22D 27/09 by using pressure
- B22D 27/15 by using vacuum
- B22D 27/18 Measures for using chemical processes for influencing the surface composition of castings, e.g. for increasing resistance to acid attack
- B22D 27/2 Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
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