IPC Subgroup
B22C 15/23 Compacting by gas pressure or vacuum
Introduced: January 1995
Last revised: January 2006
Full Title
Moulding machines for making moulds or cores, characterised by the compacting mechanism; Accessories therefor > Compacting by gas pressure or vacuum
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- CASTING; POWDER METALLURGY
- Subclass:
- FOUNDRY MOULDING
3 direct subcodes
Child Classifications
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- B22C 15/24 involving blowing devices in which the mould material is supplied in the form of loose particles
- B22C 15/26 involving propulsion devices in which the mould material is supplied in the shape of a compacted column or the like
- B22C 15/264 Compacting after charge of the mould material
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