After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity

After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity · 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 codeC01B13/145
Official title{After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity}
Display labelAfter-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity
Total patents53

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
20163
20177
20182
201910
20203
202111
20228
20232
20243
20252

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 C01B13/145?
CPC C01B13/145 is the Cooperative Patent Classification code for “After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity.”
How many patents are filed under CPC C01B13/145 (After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity)?
Our database includes 53 publications tagged with this CPC code.
Is patent activity under CPC C01B13/145 growing?
Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).