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Preliminary treatment of ores; Preliminary refining of zinc oxide

Preliminary treatment of ores; Preliminary refining of zinc oxide · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

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CPC classification statistics
Metric	Value
CPC code	C22B19/02
Official title	Preliminary treatment of ores; Preliminary refining of zinc oxide
Display label	Preliminary treatment of ores; Preliminary refining of zinc oxide
Total patents	5

Year-over-year patent counts classified under this CPC code.

Filing activity appears stable based on the most recent years.

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.