Carbon molecular sieve membranes and methods for using the same
US-2026054230-A1 · Feb 26, 2026 · US
Polyalkenyl halides
Polyalkenyl halides · 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 | B01D71/30 |
| Official title | Polyalkenyl halides |
| Display label | Polyalkenyl halides |
| Total patents | 59 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 7 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 12 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Plasma activated water production with membrane concentration
US-12528723-B2 · Jan 20, 2026 · US
Plasma activated water production with membrane concentration
US-2025214872-A1 · Jul 3, 2025 · US
Plasma activated water production with membrane concentration
US-12291470-B2 · May 6, 2025 · US
Magnesium ion selective membranes
US-12222310-B2 · Feb 11, 2025 · US
Membrane solvent extraction process for separating lithium from aluminum
US-2024408554-A1 · Dec 12, 2024 · US
Hollow fiber membrane and manufacturing method therefor
US-2024216871-A1 · Jul 4, 2024 · US
Separation of gases via carbonized vinylidene chloride copolymer gas separation membranes and processes therefor
US-11931697-B2 · Mar 19, 2024 · US
Magnesium ion selective membranes
US-2024068984-A1 · Feb 29, 2024 · US
Magnesium ion selective membranes
US-11821867-B2 · Nov 21, 2023 · US
Ion-sensitive substance, ion-sensitive membrane using the same, and method for producing the ion-sensitive substance
US-11745145-B2 · Sep 5, 2023 · US
Plasma activated water production with membrane concentration
US-2022332606-A1 · Oct 20, 2022 · US
Liquid purification membrane including carbonaceous materials and methods of forming them
US-2022323912-A1 · Oct 13, 2022 · US
Hollow Fiber Membrane
US-2022226784-A1 · Jul 21, 2022 · US
Carbon Molecular Sieve Membrane Produced From A Carbon Forming Polymer-Polyvinylidene Chloride Copolymer Blend
US-2022080361-A1 · Mar 17, 2022 · US
Asymmetric polyvinylidine chloride membranes and carbon molecular sieve membranes made therefrom
US-11229884-B2 · Jan 25, 2022 · US
Porous membrane for water treatment use
US-11224844-B2 · Jan 18, 2022 · US
Supported carbon molecular sieve membranes and method to form them
US-11202995-B2 · Dec 21, 2021 · US
Ion-sensitive substance, ion-sensitive membrane using the same, and method for producing the ion-sensitive substance
US-2021362096-A1 · Nov 25, 2021 · US
Selective extraction film for mining application
US-11077408-B2 · Aug 3, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/30?
- CPC B01D71/30 is the Cooperative Patent Classification code for “Polyalkenyl halides.”
- How many patents are filed under CPC B01D71/30 (Polyalkenyl halides)?
- Our database includes 59 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/30 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).