Pigments; Filters

Pigments; Filters · 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 codeC09D5/028
Official title{Pigments; Filters}
Display labelPigments; Filters
Total patents413

Filing trend

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

Filing activity over the last five years is growing.

Patents filed per year
YearPatents
201530
201626
201741
201835
201932
202028
202134
202252
202338
202446
202545
20266

Representative patents

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

Frequently asked questions

Answers are generated from the same data shown on this page.

What is CPC C09D5/028?
CPC C09D5/028 is the Cooperative Patent Classification code for “Pigments; Filters.”
How many patents are filed under CPC C09D5/028 (Pigments; Filters)?
Our database includes 413 publications tagged with this CPC code.
Is patent activity under CPC C09D5/028 growing?
Publication counts under this code: 46 in 2024 vs 45 in 2025 (latest complete years).