Aluminum nitride structure and method for producing same
US-12515995-B2 · Jan 6, 2026 · US
After-treatment, e.g. grinding, purification
After-treatment, e.g. grinding, purification · 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 | C01B21/0728 |
| Official title | {After-treatment, e.g. grinding, purification} |
| Display label | After-treatment, e.g. grinding, purification |
| Total patents | 49 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 7 |
| 2020 | 7 |
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Manufacturing method of modified aluminum nitride raw material, modified aluminum nitride raw material, manufacturing method of aluminum nitride crystals, and downfall defect prevention method
US-12398038-B2 · Aug 26, 2025 · US
Aluminum nitride powder and resin composition
US-2025257195-A1 · Aug 14, 2025 · US
Method for producing silicon-containing oxide-coated aluminum nitride particles and method for producing exoergic resin composition
US-12371570-B2 · Jul 29, 2025 · US
Aluminum nitride-based powder and method for producing same
US-12281010-B2 · Apr 22, 2025 · US
Silicon-containing oxide-coated aluminum nitride particle and method of manufacturing the same
US-2025026934-A1 · Jan 23, 2025 · US
Silicon-containing oxide-coated aluminum nitride particle and method of manufacturing the same
US-12139618-B2 · Nov 12, 2024 · US
Method for producing silicon-containing oxide-coated aluminum nitride particle
US-2024327646-A1 · Oct 3, 2024 · US
Surface-modified inorganic nitride, composition, thermally conductive material, and device with thermally conductive layer
US-11945717-B2 · Apr 2, 2024 · US
Surface-modified inorganic nitride, composition, thermally conductive material, and device with thermally conductive layer
US-11945718-B2 · Apr 2, 2024 · US
Method for producing surface-treated thermally conductive filler, and thermally conductive composition
US-2024059901-A1 · Feb 22, 2024 · US
Hydrophobic aluminum nitride powder and method for producing the same
US-2023416501-A1 · Dec 28, 2023 · US
Manufacturing method of modified aluminum nitride raw material, modified aluminum nitride raw material, manufacturing method of aluminum nitride crystals, and downfall defect prevention method
US-2023166972-A1 · Jun 1, 2023 · US
Aluminum nitride structure and method for producing same
US-2023127313-A1 · Apr 27, 2023 · US
Aluminum nitride film, method of manufacturing aluminum nitride film, and high withstand voltage component
US-11572275-B2 · Feb 7, 2023 · US
Silicon-containing oxide-coated aluminum nitride particle and method of manufacturing the same
US-2022363912-A1 · Nov 17, 2022 · US
Aluminum nitride powder containing no coarse particles
US-11427470-B2 · Aug 30, 2022 · US
Silicon-containing oxide-coated aluminum nitride particle and method of manufacturing the same
US-11396602-B2 · Jul 26, 2022 · US
Method for producing silicon-containing oxide-coated aluminum nitride particles and method for producing exoergic resin composition
US-2022135805-A1 · May 5, 2022 · US
Glass-coated aluminum nitride particles, method for producing same, and heat dissipating resin composition containing same
US-11254572-B2 · Feb 22, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B21/0728?
- CPC C01B21/0728 is the Cooperative Patent Classification code for “After-treatment, e.g. grinding, purification.”
- How many patents are filed under CPC C01B21/0728 (After-treatment, e.g. grinding, purification)?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC C01B21/0728 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).