High performance membranes for water reclamation using polymeric and nanomaterials
US-10456754-B2 · Oct 29, 2019 · US
Polystyrene
Polystyrene · 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 | B01D71/281 |
| Official title | {Polystyrene} |
| Display label | Polystyrene |
| Total patents | 211 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 16 |
| 2017 | 11 |
| 2018 | 14 |
| 2019 | 20 |
| 2020 | 28 |
| 2021 | 18 |
| 2022 | 26 |
| 2023 | 21 |
| 2024 | 14 |
| 2025 | 26 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Polymer composite film, preparation method therefor, and lithium-ion battery
US-2019326577-A1 · Oct 24, 2019 · US
Thermoplastic elastomer hydrogels
US-10428185-B2 · Oct 1, 2019 · US
Gas separation membrane element, gas separation membrane module and gas separation apparatus
US-2019247797-A1 · Aug 15, 2019 · US
Passive sampler and methods of making
US-2019162638-A1 · May 30, 2019 · US
Antifouling and antimicrobial coatings for thin film composite membranes
US-10293308-B2 · May 21, 2019 · US
Apparatus for generating electrical energy based on hydrophilic fiber membrane and method of fabricating same
US-2019148085-A1 · May 16, 2019 · US
Porous asymmetric polyphenylene ether membranes and associated separation modules and methods
US-10252221-B2 · Apr 9, 2019 · US
Self-wetting porous membranes (II)
US-10239023-B2 · Mar 26, 2019 · US
A method of forming a thin film through-hole membrane
US-2019022595-A1 · Jan 24, 2019 · US
Antifouling and antimicrobial coatings for thin film composite membranes
US-2019015789-A1 · Jan 17, 2019 · US
Zwitterion-containing membranes
US-10150088-B2 · Dec 11, 2018 · US
Fluoropolymers and membranes comprising fluoropolymers (III)
US-10130918-B2 · Nov 20, 2018 · US
Homogeneous Cation-Exchange Composite Membrane Having Excellent Chemical Resistance and Method for Producing the Same
US-2018326363-A1 · Nov 15, 2018 · US
Composite material comprising a non-crosslinked gel polymer
US-2018318773-A1 · Nov 8, 2018 · US
Antifouling and antimicrobial coatings for thin film composite membranes
US-10086338-B2 · Oct 2, 2018 · US
Microcapsule fabric for absorption and release
US-2018272273-A1 · Sep 27, 2018 · US
Multiblock copolymers and methods of use
US-10022679-B2 · Jul 17, 2018 · US
Oxidation method
US-2018118590-A1 · May 3, 2018 · US
Fluoropolymers and membranes comprising fluoropolymers (iii)
US-2018078908-A1 · Mar 22, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/281?
- CPC B01D71/281 is the Cooperative Patent Classification code for “Polystyrene.”
- How many patents are filed under CPC B01D71/281 (Polystyrene)?
- Our database includes 211 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/281 growing?
- Publication counts under this code: 14 in 2024 vs 26 in 2025 (latest complete years).