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by brightening or burnishing

by brightening or burnishing · 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 codeC25D5/52
Official titleby brightening or burnishing
Display labelby brightening or burnishing
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
20152
20161
20182
20193
20204
20213
20224
20232
20241
20261

Representative patents

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