Obtaining zinc or zinc oxide

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
Subclass:: PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS

Filing statistics

IPC C22B 19/00 belongs to the parent subclass C22B, which recorded 85,461 patent applications worldwide between 2013 and 2023. Annual filings grew from 6,202 in 2013 to 10,457 in 2023 (+69%). The most active applicants in class C22 are JFE STEEL (7,152 applications), NIPPON STEEL CORPORATION (5,416 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (4,530 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

[= commercial zinc]ZINC

7 direct subcodes

Child Classifications

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C22B 19/02 Preliminary treatment of ores; Preliminary refining of zinc oxide
C22B 19/04 Obtaining zinc by distilling
C22B 19/2 Obtaining zinc otherwise than by distilling
C22B 19/28 from muffle furnace residues
C22B 19/3 from metallic residues or scraps
C22B 19/32 Refining zinc
C22B 19/34 Obtaining zinc oxide

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