CPC Subgroup
B22D 11/118 by circulating the metal under, over or around weirs (B22D11/119 takes precedence)
Full Title
Continuous casting of metals, i.e. casting in indefinite lengths (metal drawing, metal extruding B21C) > Supplying or treating molten metal (B22D41/00 takes precedence) > Treating the molten metal > Refining the metal > by circulating the metal under, over or around weirs (B22D11/119 takes precedence)
Top Applicants
Top 10 applicants by patent filingsfor class B22, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,157
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 1,633
- SIEMENS DE 1,267
- POSCO (POHANG IRON AND STEEL COMPANY) KR 1,124
- CHINESE ACADEMY OF SCIENCES 1,040
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,015
- JFE STEEL JP 884
- CENTRAL SOUTH UNIVERSITY 810
- HITACHI METALS JP 641
- SINTOKOGIO JP 624