IPC Main Group
B22C 21/00 Flasks; Accessories therefor
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- CASTING; POWDER METALLURGY
- Subclass:
- FOUNDRY MOULDING
Related Keywords
foundry moulders' FLASKS
6 direct subcodes
Child Classifications
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- B22C 21/01 for vacuum-sealed moulding
- B22C 21/02 Sectional flasks, i.e. with divided, articulated, or interchangeable side sections
- B22C 21/04 Upset frames; Bottom boards or mould boards
- B22C 21/08 Clamping equipment
- B22C 21/1 Guiding equipment
- B22C 21/12 Accessories
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