Polyamide water-treatment separation membrane having superior oxidation resistance and chlorine resistance properties, and method of manufacturing the same
US-9833751-B2 · Dec 5, 2017 · US
Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes
Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes · 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 | B01D69/141 |
| Official title | {Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes} |
| Display label | Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes |
| Total patents | 236 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 23 |
| 2016 | 18 |
| 2017 | 23 |
| 2018 | 24 |
| 2019 | 25 |
| 2020 | 27 |
| 2021 | 24 |
| 2022 | 16 |
| 2023 | 23 |
| 2024 | 16 |
| 2025 | 14 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of forming an asymmetric membrane
US-2017341032-A1 · Nov 30, 2017 · US
Composite semipermeable membrane
US-9827536-B2 · Nov 28, 2017 · US
Process for forming a sintered iron oxide impregnated carbon nanotube membrane
US-2017312697-A1 · Nov 2, 2017 · US
Carbon nanotube membranes
US-2017312696-A1 · Nov 2, 2017 · US
Techniques to improve polyurethane membranes for implantable glucose sensors
US-9801574-B2 · Oct 31, 2017 · US
Fabrication of carbon nanotube membranes
US-9776140-B2 · Oct 3, 2017 · US
Method of forming an asymmetric membrane
US-9751050-B2 · Sep 5, 2017 · US
Hydrogen separation membrane, and method for manufacturing same
US-9751051-B2 · Sep 5, 2017 · US
High temperature humidification membranes
US-2017229720-A1 · Aug 10, 2017 · US
Self-healing membranes for polymer electrolyte applications
US-2017209837-A1 · Jul 27, 2017 · US
Surface free energy based filled polymer microporous films
US-9713793-B2 · Jul 25, 2017 · US
Chemically stable ceramic-metal composite membrane for hydrogen separation
US-9687775-B2 · Jun 27, 2017 · US
Asymmetric membranes for use in nanofiltration
US-2017165614-A1 · Jun 15, 2017 · US
Nanoporous polymer membranes and methods of production
US-2017144112-A1 · May 25, 2017 · US
Fabrication of carbon nanotube membranes
US-2017113189-A1 · Apr 27, 2017 · US
Hydrophobic porous silica aerogel composite membrane and vacuum membrane distillation method
US-9617174-B2 · Apr 11, 2017 · US
Semi-permeable membranes and production methods thereof
US-9597641-B2 · Mar 21, 2017 · US
Helium Recovery From Streams Containing Helium, Carbon Dioxide, and at least one of Nitrogen and Methane
US-2017045290-A1 · Feb 16, 2017 · US
Dendrimer particles and related mixed matrix filtration membranes, compositions, methods, and systems
US-2016303517-A1 · Oct 20, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D69/141?
- CPC B01D69/141 is the Cooperative Patent Classification code for “Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes.”
- How many patents are filed under CPC B01D69/141 (Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes)?
- Our database includes 236 publications tagged with this CPC code.
- Is patent activity under CPC B01D69/141 growing?
- Publication counts under this code: 16 in 2024 vs 14 in 2025 (latest complete years).