Method for producing silica particles and their use in cosmetic compositions
US-12589061-B2 · Mar 31, 2026 · US
by a dry process
by a dry process · 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 | C01B33/181 |
| Official title | {by a dry process} |
| Display label | by a dry process |
| Total patents | 45 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 9 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 6 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Spherical silica powder and method for producing spherical silica powder
US-2026070795-A1 · Mar 12, 2026 · US
System and method for performing separation and dehydroxylation of fumed silica soot particles
US-12466737-B2 · Nov 11, 2025 · US
Silicon-oxygen compound, secondary battery using it, and related battery module, battery pack and device
US-12381211-B2 · Aug 5, 2025 · US
System and method for performing separation and dehydroxylation of fumed silica soot particles
US-2024327230-A1 · Oct 3, 2024 · US
Spherical silica powder
US-12091528-B2 · Sep 17, 2024 · US
Metal oxide powder, and method for producing same
US-2024182318-A1 · Jun 6, 2024 · US
Silica-alumina powder, method for producing silica-alumina powder, fluid catalytic cracking catalyst and method for producing same
US-2024166526-A1 · May 23, 2024 · US
Silica powder and production method therefor
US-2024150184-A1 · May 9, 2024 · US
Fumed silica powder with reduced silanol group density
US-2024116764-A1 · Apr 11, 2024 · US
Method for manufacture of amorphous silica-alumina composition in the presence of ODSO
US-11649169-B2 · May 16, 2023 · US
Silicon-oxygen compound, secondary battery using it, and related battery module, battery pack and device
US-2023119054-A1 · Apr 20, 2023 · US
Method for manufacture of amorphous silica-alumina composition in the presence of odso
US-2023104372-A1 · Apr 6, 2023 · US
Molded body made of opaque quartz glass and method for producing same
US-2022411310-A1 · Dec 29, 2022 · US
Silicon-oxygen compound, secondary battery using it, and related battery module, battery pack and device
US-11522181-B2 · Dec 6, 2022 · US
Method for producing silica particles and their use in cosmetic compositions
US-2022354757-A1 · Nov 10, 2022 · US
Spherical silica powder
US-2022169832-A1 · Jun 2, 2022 · US
Silicon-oxygen compound, secondary battery using it, and related battery module, battery pack and device
US-2022140328-A1 · May 5, 2022 · US
Bisaminoalkoxysilane compounds and methods for using same to deposit silicon-containing films
US-11142658-B2 · Oct 12, 2021 · US
Silicon nanoparticle-containing hydrogen polysilsesquioxane calcined product, negative electrode active material for lithium ion battery, negative electrode for lithium ion battery and lithium ion battery
US-11127947-B2 · Sep 21, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B33/181?
- CPC C01B33/181 is the Cooperative Patent Classification code for “by a dry process.”
- How many patents are filed under CPC C01B33/181 (by a dry process)?
- Our database includes 45 publications tagged with this CPC code.
- Is patent activity under CPC C01B33/181 growing?
- Publication counts under this code: 6 in 2024 vs 2 in 2025 (latest complete years).