Silicates (persilicates C01B15/14 {; containing aluminium C01B33/26})

Silicates (persilicates C01B15/14 {; containing aluminium C01B33/26}) · 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 codeC01B33/20
Official titleSilicates (persilicates C01B15/14 {; containing aluminium C01B33/26})
Display labelSilicates (persilicates C01B15/14 {; containing aluminium C01B33/26})
Total patents232

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
201516
201627
201721
201815
201924
202024
202124
202222
202316
202422
202518
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 C01B33/20?
CPC C01B33/20 is the Cooperative Patent Classification code for “Silicates (persilicates C01B15/14 {; containing aluminium C01B33/26}).”
How many patents are filed under CPC C01B33/20 (Silicates (persilicates C01B15/14 {; containing aluminium C01B33/26}))?
Our database includes 232 publications tagged with this CPC code.
Is patent activity under CPC C01B33/20 growing?
Publication counts under this code: 22 in 2024 vs 18 in 2025 (latest complete years).