Porous water decontamination membrane
US-12465895-B2 · Nov 11, 2025 · US
Polyarylates
Polyarylates · 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 | B01D71/481 |
| Official title | {Polyarylates} |
| Display label | Polyarylates |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 13 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for cleaning a fouled water purification membrane
US-12465894-B2 · Nov 11, 2025 · US
Filtration membrane
US-12458932-B2 · Nov 4, 2025 · US
Method for photocatalytic degradation of organic pollutants
US-12440810-B1 · Oct 14, 2025 · US
Method for cleaning a fouled water purification membrane
US-2025312753-A1 · Oct 9, 2025 · US
Porous water decontamination membrane
US-2025312754-A1 · Oct 9, 2025 · US
Method for photocatalytic degradation of organic pollutants
US-2025312752-A1 · Oct 9, 2025 · US
Porous self-cleaning photocatalytic membrane
US-2025312751-A1 · Oct 9, 2025 · US
Porous self-cleaning photocatalytic membrane
US-12434205-B1 · Oct 7, 2025 · US
Polypyrrole-graphitic carbon nitride-based photoresponsive membranes
US-12343688-B2 · Jul 1, 2025 · US
Membranes with reduced particle formation
US-2025205650-A1 · Jun 26, 2025 · US
Spiral-wound filter module exhibiting almost no heavy metal leaching and manufacturing method thereof
US-12337283-B2 · Jun 24, 2025 · US
Composite membrane for desalination
US-2025178930-A1 · Jun 5, 2025 · US
Filtration membrane
US-2024375063-A1 · Nov 14, 2024 · US
Polypyrrole-graphitic carbon nitride-based photoresponsive membranes
US-2024198297-A1 · Jun 20, 2024 · US
Hollow porous fibers
US-11767615-B2 · Sep 26, 2023 · US
Hollow fiber membrane module and method for removing endotoxins
US-2023070035-A1 · Mar 9, 2023 · US
Hollow Fiber Membrane, Module of the Hollow Fiber Membrane, Humidifying Unit, Air Dryer, Dope Solution for the Hollow Fiber Membrane, and Method for Producing the Hollow Fiber Membrane
US-2022168690-A1 · Jun 2, 2022 · US
Hollow Porous Fibers
US-2022002911-A1 · Jan 6, 2022 · US
Spiral-wound filter module exhibiting almost no heavy metal leaching and manufacturing method thereof
US-2021322927-A1 · Oct 21, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/481?
- CPC B01D71/481 is the Cooperative Patent Classification code for “Polyarylates.”
- How many patents are filed under CPC B01D71/481 (Polyarylates)?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/481 growing?
- Publication counts under this code: 2 in 2024 vs 13 in 2025 (latest complete years).