PatentsDB

Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type {(activation of naturally occurring clays B01J20/12; pillared layered base-exchange silicates B01J29/049)}

Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type {(activation of naturally occurring clays B01J20/12; pillared layered base-exchange silicates B01J29/049)} · 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 codeC01B33/38
Official titleLayered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type {(activation of naturally occurring clays B01J20/12; pillared layered base-exchange silicates B01J29/049)}
Display labelLayered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type {(activation of naturally occurring clays B01J20/12; pillared layered base-exchange silicates B01J29/049)}
Total patents41

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
20153
20163
20172
20185
20192
20203
20216
20221
20231
202413
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 C01B33/38?
CPC C01B33/38 is the Cooperative Patent Classification code for “Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type {(activation of naturally occurring clays B01J20/12; pillared layered base-exchange silicates B01J29/049)}.”
How many patents are filed under CPC C01B33/38 (Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type {(activation of naturally occurring clays B01J20/12; pillared layered base-exchange silicates B01J29/049)})?
Our database includes 41 publications tagged with this CPC code.
Is patent activity under CPC C01B33/38 growing?
Publication counts under this code: 13 in 2024 vs 2 in 2025 (latest complete years).