Pseudo-boehmite, manufacturing process and application thereof
US-12421128-B2 · Sep 23, 2025 · US
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Purification of aluminium oxide, aluminium hydroxide or aluminates (C01F7/028 takes precedence)
Purification of aluminium oxide, aluminium hydroxide or aluminates (C01F7/028 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 | C01F7/46 |
| Official title | Purification of aluminium oxide, aluminium hydroxide or aluminates (C01F7/028 takes precedence) |
| Display label | Purification of aluminium oxide, aluminium hydroxide or aluminates (C01F7/028 takes precedence) |
| Total patents | 22 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 6 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Metal oxide powder, and method for producing same
US-2024182318-A1 · Jun 6, 2024 · US
Systems and methods for alumina production
US-11584657-B2 · Feb 21, 2023 · US
Non-destructive process for removing metals, metal ions and metal oxides from alumina-based materials
US-11498847-B2 · Nov 15, 2022 · US
Pseudo-boehmite, manufacturing process and application thereof
US-2022055911-A1 · Feb 24, 2022 · US
Recovery of mining processing product using boronic acid-containing polymers
US-11208332-B2 · Dec 28, 2021 · US
Alumina having acidity and structure with a porosity which are optimal
US-11110431-B2 · Sep 7, 2021 · US
Non-destructive process for removing metals, metal ions and metal oxides from alumina-based materials
US-2020207635-A1 · Jul 2, 2020 · US
Polyaluminum salts and their uses in preparation of high-purity colloidal aluminum-silica composite particles and zeolites
US-10654724-B2 · May 19, 2020 · US
Systems and methods for alumina production
US-2020031683-A1 · Jan 30, 2020 · US
Alumina having acidity and structure with a porosity which are optimal
US-2020030773-A1 · Jan 30, 2020 · US
Waterborne aerogel and method for producing same
US-10544048-B2 · Jan 28, 2020 · US
Recovery of mining processing product using boronic acid-containing polymers
US-2020024148-A1 · Jan 23, 2020 · US
Recovery of mining processing product using boronic acid-containing polymers
US-10427950-B2 · Oct 1, 2019 · US
Aluminum hydroxide coagulant recovery from water/wastewater treatment sludge
US-10358355-B2 · Jul 23, 2019 · US
Aluminum hydroxide coagulant recovery from water/wastewater treatment sludge
US-2019185335-A1 · Jun 20, 2019 · US
Polyaluminum salts and their uses in preparation of high-purity colloidal aluminum-silica composite particles and zeolites
US-2018155203-A1 · Jun 7, 2018 · US
Reducing aluminosilicate scale in the Bayer process
US-9944534-B2 · Apr 17, 2018 · US
Recovery of mining processing product using boronic acid-containing polymers
US-2017158522-A1 · Jun 8, 2017 · US
Waterborne aerogel and method for producing same
US-2017081200-A1 · Mar 23, 2017 · US