IPC Subgroup
B22D 41/3 Manufacturing or repairing thereof
Introduced: January 1990
Last revised: January 2006
Full Title
Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like > Closures > sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings > Plates therefor > Manufacturing or repairing thereof
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- CASTING; POWDER METALLURGY
- Subclass:
- CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
1 direct subcode
Child Classifications
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- B22D 41/32 characterised by the materials used 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