Buffer material composed of bentonite modified with layered double hydroxide(ldh) and method of preparing the same
US-2023381737-A1 · Nov 30, 2023 · US
Clays
Clays · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01B33/40 |
| Official title | Clays |
| Display label | Clays |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 8 |
| 2021 | 6 |
| 2022 | 12 |
| 2023 | 12 |
| 2024 | 9 |
| 2025 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Nanomaterials, nanocomposite materials, and methods thereof
US-11814291-B2 · Nov 14, 2023 · US
Talc particulate
US-2023227320-A1 · Jul 20, 2023 · US
Titanium oxide composition, dispersion liquid, and member having titanium oxide composition in surface layer
US-2023219065-A1 · Jul 13, 2023 · US
Composition and method for producing same
US-2023193124-A1 · Jun 22, 2023 · US
Composition and process for pelletizing carbon-based materials for proppant and industrial applications
US-2023182098-A1 · Jun 15, 2023 · US
Clay nanoparticle preparation for industrial applications
US-2023150826-A1 · May 18, 2023 · US
Multifunctional fluorescent polymer-clay composite tracers
US-2023144199-A1 · May 11, 2023 · US
Composition and method for producing same
US-2023137287-A1 · May 4, 2023 · US
Composition and process for pelletizing carbon-based materials for proppant and industrial applications
US-11590469-B2 · Feb 28, 2023 · US
Hydrated Ionic Clay and Tobacco Material Compositions
US-2022324715-A1 · Oct 13, 2022 · US
A semi-wet milling strategy to fabricate ultra-small nano-clay
US-2022305692-A1 · Sep 29, 2022 · US
Method of producing sodium bentonite
US-11447395-B2 · Sep 20, 2022 · US
Modified montmorillonite self-repairing agent and preparation method and use thereof
US-2022267162-A1 · Aug 25, 2022 · US
Sheet silicate lamellae with a high aspect ratio
US-2022185684-A1 · Jun 16, 2022 · US
Sheet silicate lamellae with a high aspect ratio
US-11358874-B2 · Jun 14, 2022 · US
Method for preparing synthetic mineral particles
US-11352264-B2 · Jun 7, 2022 · US
Composition and process for pelletizing carbon-based materials for proppant and industrial applications
US-2022126246-A1 · Apr 28, 2022 · US
Nanomaterials, nanocomposite materials, and methods thereof
US-2022073353-A1 · Mar 10, 2022 · US
Composition for dyeing bentonite and method for dyeing bentonite
US-2022064453-A1 · Mar 3, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B33/40?
- CPC C01B33/40 is the Cooperative Patent Classification code for “Clays.”
- How many patents are filed under CPC C01B33/40 (Clays)?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC C01B33/40 growing?
- Publication counts under this code: 9 in 2024 vs 10 in 2025 (latest complete years).