Large-scale fabrication technique for PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol for gas separation
US-12521681-B2 · Jan 13, 2026 · US
Polyethylene glycol
Polyethylene glycol · 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 | B01D2323/2185 |
| Official title | Polyethylene glycol |
| Display label | Polyethylene glycol |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 6 |
| 2019 | 8 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System for separating oil and water mixture using hydrophilic modified polystyrene and hydrophobic polyurethane
US-12485365-B2 · Dec 2, 2025 · US
Polyethylene glycol functionalized aromatic polyimides for high performance co2 capture applications beyond natural gas purification
US-2025108342-A1 · Apr 3, 2025 · US
Large-scale fabrication technique for pim-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol for gas separation
US-2025091015-A1 · Mar 20, 2025 · US
Combination of pyrrolidone based solvents for the production of porous membranes
US-12226738-B2 · Feb 18, 2025 · US
Porous hollow fiber membrane
US-12172135-B2 · Dec 24, 2024 · US
Membranes in the form of hollow fibers for the separation of CO2 from natural gas and method of preparation by heat treatment and development of a polymeric membrane precursor
US-12121865-B2 · Oct 22, 2024 · US
System for separating oil and water mixture using hydrophilic modified polystyrene and hydrophobic polyurethane
US-2024254014-A1 · Aug 1, 2024 · US
Solution of polymer p in n-tert-butyl-2-pyrrolidione for the use of membranes
US-2024209161-A1 · Jun 27, 2024 · US
Photothermal photocatalytic membrane for seawater desalination and uranium extraction and preparation method therefor
US-11951445-B2 · Apr 9, 2024 · US
Photothermal Photocatalytic Membrane for Seawater Desalination And Uranium Extraction And Preparation Method Therefor
US-2023381719-A1 · Nov 30, 2023 · US
Solution of polysulfone polymers in gamma-valerolactone for the use in membranes
US-2023146760-A1 · May 11, 2023 · US
Composition and method for manufacturing sulfone polymer membrane
US-11565217-B2 · Jan 31, 2023 · US
Combination of pyrrolidone based solvents for the production of porous membranes
US-2022203306-A1 · Jun 30, 2022 · US
Polymer blended membranes for sour gas separation
US-11311837-B2 · Apr 26, 2022 · US
Method, spinneret and system for fabricating multilayer membranes
US-11247180-B2 · Feb 15, 2022 · US
Method for creating a porous film through aqueous phase separation
US-2022002508-A1 · Jan 6, 2022 · US
Porous hollow fiber membrane
US-2021346849-A1 · Nov 11, 2021 · US
Membranes in the form of hollow fibers for the separation of co2 from natural gas and method of preparation by heat treatment and development of a polymeric membrane precursor
US-2021154620-A1 · May 27, 2021 · US
Porous membrane and process for producing porous membrane
US-10974204-B2 · Apr 13, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2323/2185?
- CPC B01D2323/2185 is the Cooperative Patent Classification code for “Polyethylene glycol.”
- How many patents are filed under CPC B01D2323/2185 (Polyethylene glycol)?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC B01D2323/2185 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).