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containing also nitrate or nitrite anions

containing also nitrate or nitrite anions · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeC23C22/13
Official titlecontaining also nitrate or nitrite anions
Display labelcontaining also nitrate or nitrite anions
Total patents23

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20151
20161
20182
20192
20202
20213
20223
20232
20246
20251

Representative patents

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