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by punching out

by punching out · 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 codeC03B21/04
Official titleby punching out
Display labelby punching out
Total patents15

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20152
20163
20172
20183
20193
20252

Representative patents

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