B22C 1/02 characterised by additives for special purposes, e.g. indicators, breakdown additives
Full Title
Compositions of refractory mould or core materials; Grain structures thereof (refractory materials in general C04B35/00); Chemical or physical features in the formation or manufacture of moulds > characterised by additives for special purposes, e.g. indicators, breakdown additives
Filing statistics
CPC B22C 1/02 belongs to the parent subclass B22C, which recorded 29,163 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,545 in 2013 to 2,127 in 2023 (+38%), peaking at 3,597 applications in 2018. The most active applicants in class B22 are GE (GENERAL ELECTRIC COMPANY) (2,157 applications), HEWLETT-PACKARD DEVELOPMENT COMPANY (1,633 applications) and SIEMENS (1,267 applications).
Source: EPO PATSTAT, worldwide filings
5 direct subcodes
Child Classifications
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- B22C 1/04 for protection of the casting, e.g. against decarbonisation
- B22C 1/08 for decreasing shrinkage of the mould, e.g. for investment casting
- B22C 1/10 for influencing the hardening tendency of the mould material (influencing the hardening tendency of the binding agent only B22C1/16)
- B22C 1/12 for manufacturing permanent moulds or cores
- B22C 1/14 for separating the pattern from the mould
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