CPC Subgroup
B22F 1/145 Chemical treatment, e.g. passivation or decarburisation
Full Title
Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties > Treatment of metallic powder (mixing with lubricating or binding agents or with organic material B22F1/10) > Chemical treatment, e.g. passivation or decarburisation
1 direct subcode
Child Classifications
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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