containing mixtures of the silica-lime type

containing mixtures of the silica-lime type · 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 codeC04B28/18
Official titlecontaining mixtures of the silica-lime type
Display labelcontaining mixtures of the silica-lime type
Total patents238

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
201512
201626
201736
201829
201918
202022
202127
202219
202326
202411
20259
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 C04B28/18?
CPC C04B28/18 is the Cooperative Patent Classification code for “containing mixtures of the silica-lime type.”
How many patents are filed under CPC C04B28/18 (containing mixtures of the silica-lime type)?
Our database includes 238 publications tagged with this CPC code.
Is patent activity under CPC C04B28/18 growing?
Publication counts under this code: 11 in 2024 vs 9 in 2025 (latest complete years).