CLAY SOIL MODIFICATION WITH Ca2+ EXCHANGEABLE CATION
US-2018355247-A1 · Dec 13, 2018 · US
Clay; Kaolin
Clay; Kaolin · 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 | C04B33/04 |
| Official title | Clay; Kaolin |
| Display label | Clay; Kaolin |
| Total patents | 163 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 12 |
| 2017 | 23 |
| 2018 | 24 |
| 2019 | 22 |
| 2020 | 14 |
| 2021 | 12 |
| 2022 | 13 |
| 2023 | 12 |
| 2024 | 12 |
| 2025 | 7 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
EXCHANGABLE CATION (Mg) SWELL POTENTIAL REDUCTION METHOD
US-2018346812-A1 · Dec 6, 2018 · US
Ceramic particles for use in a solar power tower
US-10107523-B2 · Oct 23, 2018 · US
Feedstock for 3d printing and uses thereof
US-2018298215-A1 · Oct 18, 2018 · US
Method for modifying clay soils with gypsum
US-10094086-B2 · Oct 9, 2018 · US
Heat-dissipating ceramic foam containing carbonized cellulose particles and method for producing the same
US-2018282232-A1 · Oct 4, 2018 · US
Process for converting calcium bentonite to sodium bentonite
US-10081574-B2 · Sep 25, 2018 · US
Subgrade irrigation for site preparation having clayey expansive soil
US-2018265783-A1 · Sep 20, 2018 · US
Methods of making proppant particles from slurry droplets and methods of use
US-10077398-B2 · Sep 18, 2018 · US
Ceramic honeycomb structure and its production method
US-10065141-B2 · Sep 4, 2018 · US
Composite material, components comprising same and method of using same
US-2018215671-A1 · Aug 2, 2018 · US
Method for modifying clay soils with gypsum
US-2018209112-A1 · Jul 26, 2018 · US
Method for reducing swell potential of expansive clay mineral and expansive clayey soil with molecular level simulation
US-10024016-B2 · Jul 17, 2018 · US
Inner cabinet for regrigerator and refrigerator including the same
US-2018187960-A1 · Jul 5, 2018 · US
Precious metal clay regeneration solution and method for regenerating precious metal clay
US-9868669-B2 · Jan 16, 2018 · US
Process for treatment of nanoparticles of mineral filler for use in polymerization in the presence of nanoparticles
US-2018002529-A1 · Jan 4, 2018 · US
Vermiculite core for vehicle and method for manufacturing thereof
US-2017369378-A1 · Dec 28, 2017 · US
Sintered clay mineral matrix doped with rare earth metals, transition metals, or post-transition metals
US-9828294-B2 · Nov 28, 2017 · US
Methods of making hydrous kaolin clay and products made thereof
US-2017298229-A1 · Oct 19, 2017 · US
Lightweight hollow particles for use in cementing
US-9765253-B2 · Sep 19, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C04B33/04?
- CPC C04B33/04 is the Cooperative Patent Classification code for “Clay; Kaolin.”
- How many patents are filed under CPC C04B33/04 (Clay; Kaolin)?
- Our database includes 163 publications tagged with this CPC code.
- Is patent activity under CPC C04B33/04 growing?
- Publication counts under this code: 12 in 2024 vs 7 in 2025 (latest complete years).