Recovery of critical elements from end-of-life lithium ion batteries with supported membrane solvent extraction
US-2021376400-A1 · Dec 2, 2021 · US
Liquid-membrane separation
Liquid-membrane separation · 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 | B01D61/38 |
| Official title | Liquid-membrane separation |
| Display label | Liquid-membrane separation |
| Total patents | 101 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 9 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 9 |
| 2020 | 16 |
| 2021 | 9 |
| 2022 | 13 |
| 2023 | 11 |
| 2024 | 5 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Analyte extraction
US-11131608-B2 · Sep 28, 2021 · US
Module for gas separation, and gas separation method
US-11077405-B2 · Aug 3, 2021 · US
Free-standing liquid membranes for substance separation, filtration, extraction, and blockage
US-2021229039-A1 · Jul 29, 2021 · US
Mixed gas integrity testing of porous materials without permeate side access
US-10955328-B2 · Mar 23, 2021 · US
Dual pumping arrangement for a hollow fiber filter
US-2020398197-A1 · Dec 24, 2020 · US
Fluid separation membrane
US-2020391161-A1 · Dec 17, 2020 · US
Method for producing ionic liquid-containing structure, and ionic liquid-containing structure
US-2020362140-A1 · Nov 19, 2020 · US
Dual pumping arrangement for a hollow fiber filter
US-10792594-B2 · Oct 6, 2020 · US
Self-supporting highly moisture-permeable heat-insulating aerogel film and preparation method thereof
US-2020261854-A1 · Aug 20, 2020 · US
System and Method for Controlling Outlet Flow of a Device for Separating Cellular Suspensions
US-2020261851-A1 · Aug 20, 2020 · US
Free-standing liquid membranes for substance separation, filtration, extraction, and blockage
US-2020246753-A1 · Aug 6, 2020 · US
Method and apparatus for in situ product recovery
US-2020197871-A1 · Jun 25, 2020 · US
System and method for controlling outlet flow of a device for separating cellular suspensions
US-10682611-B2 · Jun 16, 2020 · US
Method and system for light olefin separation
US-10683246-B2 · Jun 16, 2020 · US
Free-standing liquid membranes for substance separation, filtration, extraction, and blockage
US-10668431-B1 · Jun 2, 2020 · US
Free-standing liquid membranes for substance separation, filtration, extraction, and blockage
US-2020147552-A1 · May 14, 2020 · US
Ionic liquid-containing laminate and method for producing same
US-2020094195-A1 · Mar 26, 2020 · US
High volume water electrolyzing system and method of using
US-10577262-B2 · Mar 3, 2020 · US
Molten hydroxide membrane for separation of acid gases from emissions
US-2020030740-A1 · Jan 30, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D61/38?
- CPC B01D61/38 is the Cooperative Patent Classification code for “Liquid-membrane separation.”
- How many patents are filed under CPC B01D61/38 (Liquid-membrane separation)?
- Our database includes 101 publications tagged with this CPC code.
- Is patent activity under CPC B01D61/38 growing?
- Publication counts under this code: 5 in 2024 vs 6 in 2025 (latest complete years).