Microporous aerogel
US-2026042078-A1 · Feb 12, 2026 · US
Concentration; Drying; Dehydration; Stabilisation; Purification {(C01B33/1465 takes precedence)}
Concentration; Drying; Dehydration; Stabilisation; Purification {(C01B33/1465 takes precedence)} · 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 | C01B33/148 |
| Official title | Concentration; Drying; Dehydration; Stabilisation; Purification {(C01B33/1465 takes precedence)} |
| Display label | Concentration; Drying; Dehydration; Stabilisation; Purification {(C01B33/1465 takes precedence)} |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Unidirectional, interconnected super-micropore silica support
US-2026035253-A1 · Feb 5, 2026 · US
Ester-dispersed silica sol and production method therefor
US-2025197644-A1 · Jun 19, 2025 · US
Silica particle and production method therefor, silica sol, polishing composition, polishing method, method for producing semiconductor wafer and method for producing semiconductor device
US-12297376-B2 · May 13, 2025 · US
Method for manufacturing silica sol
US-2024199432-A1 · Jun 20, 2024 · US
Composite film of 6FPBO and triple-shelled mesoporous silica hollow spheres and its preparation and use
US-11965070-B2 · Apr 23, 2024 · US
Composite oxide powder and method for production thereof
US-11932543-B2 · Mar 19, 2024 · US
Silica particle and production method therefor, silica sol, polishing composition, polishing method, method for producing semiconductor wafer and method for producing semiconductor device
US-11862470-B2 · Jan 2, 2024 · US
Microporous aerogel
US-2023398515-A1 · Dec 14, 2023 · US
Modified colloidal silica and method for producing the same, and polishing agent using the same
US-11530335-B2 · Dec 20, 2022 · US
Modified colloidal silica and method for producing the same, and polishing agent using the same
US-11499070-B2 · Nov 15, 2022 · US
Composite Film of 6FPBO and Triple-Shelled Mesoporous Silica Hollow Spheres and Its Preparation and Use
US-2022145023-A1 · May 12, 2022 · US
Silica particle and production method therefor, silica sol, polishing composition, polishing method, method for producing semiconductor wafer and method for producing semiconductor device
US-2021380844-A1 · Dec 9, 2021 · US
Silica particle and production method therefor, silica sol, polishing composition, polishing method, method for producing semiconductor wafer and method for producing semiconductor device
US-2021375631-A1 · Dec 2, 2021 · US
Silica membrane filter
US-11045770-B2 · Jun 29, 2021 · US
Composite oxide powder and method for production thereof
US-2021009432-A1 · Jan 14, 2021 · US
Method for producing purified aqueous solution of silicic acid
US-10865113-B2 · Dec 15, 2020 · US
Method for manufacturing silica sol
US-2020308010-A1 · Oct 1, 2020 · US
Toner for developing electrostatic images
US-10539894-B2 · Jan 21, 2020 · US
Modified colloidal silica and method for producing the same, and polishing agent using the same
US-2019309191-A1 · Oct 10, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B33/148?
- CPC C01B33/148 is the Cooperative Patent Classification code for “Concentration; Drying; Dehydration; Stabilisation; Purification {(C01B33/1465 takes precedence)}.”
- How many patents are filed under CPC C01B33/148 (Concentration; Drying; Dehydration; Stabilisation; Purification {(C01B33/1465 takes precedence)})?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC C01B33/148 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).