IPC Subgroup
C22C 1/053 with formation of hard compounds
Introduced: January 2023
Full Title
Making non-ferrous alloys > by powder metallurgy > Mixtures of metal powder with non-metallic powder > Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor > with formation of hard compounds
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- Subclass:
- ALLOYS
Additional Content
in situ formation the phase formed (whether metal or non-metal) is not added in advance, but is generated in situ in the matrix by reaction during the entire process of preparing the alloy, including powder treatment, sintering, etc.
2 direct subcodes
Child Classifications
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- C22C 1/055 using carbon
- C22C 1/056 using gas
Top Applicants
Top 10 applicants by patent filingsfor class C22, 2013–2023, worldwide · Source: EPO PATSTAT
- JFE STEEL JP 7,152
- NIPPON STEEL CORPORATION JP 5,416
- POSCO (POHANG IRON AND STEEL COMPANY) KR 4,530
- JFE STEEL 3,986
- CENTRAL SOUTH UNIVERSITY 3,086
- NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,843
- CHINESE ACADEMY OF SCIENCES 2,702
- ARCELORMITTAL LU 2,124
- NSSMC (NIPPON STEEL & SUMITOMO METAL) 2,075
- KOBE STEEL JP 1,891