Graft polyarylether copolymers
US-2026085142-A1 · Mar 26, 2026 · US
Aromatic polyethers
Aromatic polyethers · 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 | B01D71/522 |
| Official title | {Aromatic polyethers} |
| Display label | Aromatic polyethers |
| Total patents | 38 |
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 |
| 2017 | 2 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 1 |
| 2024 | 6 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
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
Substance, membrane, use of a membrane and method for the preparation of a substance
US-2025163232-A1 · May 22, 2025 · US
Semipermeable Membrane
US-2025099920-A1 · Mar 27, 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
Poly(aryl ether) based polymers and associated methods
US-12252584-B2 · Mar 18, 2025 · US
Process for the production and purification of trifluoroethylene
US-2025066278-A1 · Feb 27, 2025 · US
Process for the preparation and purification of trifluoroethylene
US-2025051251-A1 · Feb 13, 2025 · US
Ultra-violet treatment of membranes and resulting membrane
US-12128363-B2 · Oct 29, 2024 · US
Process for synthesising semi-aromatic polyethers
US-12098244-B2 · Sep 24, 2024 · US
Polyarylene ether copolymer
US-12091485-B2 · Sep 17, 2024 · US
Polyarylene ether
US-12091503-B2 · Sep 17, 2024 · US
Separation membrane with excellent fouling resistance and method for manufacturing same
US-2024286089-A1 · Aug 29, 2024 · US
Aromatic polyethers containing a biosourced furan diol
US-12037453-B2 · Jul 16, 2024 · US
Multilayer aromatic polyamide thin-film composite membranes for separation of gas mixtures
US-11724230-B2 · Aug 15, 2023 · US
Polysulfone-urethane copolymer, membranes and products incorporating same, and methods for making and using same
US-11499016-B2 · Nov 15, 2022 · US
Purification methods comprising the use of membranes obtained from bio-based sulfone polymers
US-2022297066-A1 · Sep 22, 2022 · US
Poly(aryl ether) based polymers and associated methods
US-2022282042-A1 · Sep 8, 2022 · US
Process for synthesising semi-aromatic polyethers
US-2022177648-A1 · Jun 9, 2022 · US
Polyarylene ether copolymer
US-2022098352-A1 · Mar 31, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/522?
- CPC B01D71/522 is the Cooperative Patent Classification code for “Aromatic polyethers.”
- How many patents are filed under CPC B01D71/522 (Aromatic polyethers)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/522 growing?
- Publication counts under this code: 6 in 2024 vs 6 in 2025 (latest complete years).