Ceramic base material, ceramic support, and separation membrane complex
US-2024399316-A1 · Dec 5, 2024 · US
Aluminium oxide
Aluminium oxide · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D71/025 |
| Official title | {Aluminium oxide} |
| Display label | Aluminium oxide |
| Total patents | 234 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 16 |
| 2017 | 21 |
| 2018 | 25 |
| 2019 | 28 |
| 2020 | 29 |
| 2021 | 25 |
| 2022 | 26 |
| 2023 | 16 |
| 2024 | 13 |
| 2025 | 16 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Porous medium with adjustable fluid permeability and associated systems and methods
US-11872525-B2 · Jan 16, 2024 · US
Method for producing porous bodies with enhanced properties
US-10124318-B2 · Nov 13, 2018 · US
Membrane reactor with a tubular permeable membrane
US-10105655-B2 · Oct 23, 2018 · US
Transfer line
US-10105658-B2 · Oct 23, 2018 · US
Ultrafine continuous fibrous ceramic filter and method of manufacturing same
US-9994488-B2 · Jun 12, 2018 · US
Method of manufacturing composite film
US-2018093459-A1 · Apr 5, 2018 · US
Porous bodies with enhanced pore architecture
US-2018021755-A1 · Jan 25, 2018 · US
Composite molecular sieve membrane, preparation process and use thereof
US-2018008937-A1 · Jan 11, 2018 · US
Method for preparing antibacterial and dust-removal membrane
US-9815029-B2 · Nov 14, 2017 · US
Transfer line
US-2017312701-A1 · Nov 2, 2017 · US
Ceramic filter
US-9802143-B2 · Oct 31, 2017 · US
Catalytic membrane system for converting biomass to hydrogen
US-2017283721-A1 · Oct 5, 2017 · US
Porous bodies with enhanced pore architecture
US-9776169-B2 · Oct 3, 2017 · US
Method for Preparing Antibacterial and Dust-removal Membrane
US-2017259213-A1 · Sep 14, 2017 · US
Treatment of produced water, particularly obtained from a chemically enhanced oil recovery process using viscosity-increasing polymers
US-2017247999-A1 · Aug 31, 2017 · US
Aluminum oxide supported gas permeable membranes
US-2017239624-A1 · Aug 24, 2017 · US
Ceramic filter
US-2017232400-A1 · Aug 17, 2017 · US
Fluid Permeable Anodic Oxide Film and Fluid Permeable Body Using Anodic Oxide Film
US-2017167025-A1 · Jun 15, 2017 · US
Substrate for liquid filter and method for producing the same
US-2017151534-A1 · Jun 1, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/025?
- CPC B01D71/025 is the Cooperative Patent Classification code for “Aluminium oxide.”
- How many patents are filed under CPC B01D71/025 (Aluminium oxide)?
- Our database includes 234 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/025 growing?
- Publication counts under this code: 13 in 2024 vs 16 in 2025 (latest complete years).