Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence)

Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence) · 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 codeC09K5/08
Official titleMaterials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence)
Display labelMaterials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence)
Total patents163

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
201513
201632
201718
201817
201918
202012
202112
202210
202312
202412
20254
20263

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 C09K5/08?
CPC C09K5/08 is the Cooperative Patent Classification code for “Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence).”
How many patents are filed under CPC C09K5/08 (Materials not undergoing a change of physical state when used (C09K5/16, C09K5/20 take precedence))?
Our database includes 163 publications tagged with this CPC code.
Is patent activity under CPC C09K5/08 growing?
Publication counts under this code: 12 in 2024 vs 4 in 2025 (latest complete years).