Necklace-shaped nanofiber hybrid membrane for simultaneous removal of particulate matter and sulfides and method for preparing the same
US-2026084118-A1 · Mar 26, 2026 · US
Polyvinylchloride
Polyvinylchloride · 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 | B01D71/301 |
| Official title | {Polyvinylchloride} |
| Display label | Polyvinylchloride |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 14 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Carbon molecular sieve membranes and methods for using the same
US-2026054230-A1 · Feb 26, 2026 · US
Magnesium ion selective membranes
US-12050193-B2 · Jul 30, 2024 · US
Carbon molecular sieve membrane produced from a carbon forming polymer-polyvinylidene chloride copolymer blend
US-12036518-B2 · Jul 16, 2024 · US
Magnesium ion selective PVC membranes
US-12013366-B2 · Jun 18, 2024 · US
Separation of gases via carbonized vinylidene chloride copolymer gas separation membranes and processes therefor
US-11931697-B2 · Mar 19, 2024 · US
Method for improving the airtightness of buildings using a biopolymer-based membrane
US-2024058766-A1 · Feb 22, 2024 · US
Metal-organic framework material separation membrane, preparation method therefor, and use thereof
US-2023415101-A1 · Dec 28, 2023 · US
Microporous membranes, underlayment, roofing, flashing, wrap, and methods for making and using the same
US-2023381720-A1 · Nov 30, 2023 · US
Microporous membranes, underlayment, roofing, flashing, wrap, and methods for making and using the same
US-11766642-B2 · Sep 26, 2023 · US
Porous fluorine-based resin composite membrane and manufacturing method therefor
US-11654403-B2 · May 23, 2023 · US
Filtration Filter And Method For Producing The Same
US-2022362719-A1 · Nov 17, 2022 · US
Hollow Fiber Membrane
US-2022226784-A1 · Jul 21, 2022 · US
Separation membrane module
US-2022088539-A1 · Mar 24, 2022 · US
Carbon Molecular Sieve Membrane Produced From A Carbon Forming Polymer-Polyvinylidene Chloride Copolymer Blend
US-2022080361-A1 · Mar 17, 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
Cell separation filter, filtering device, and manufacturing method for cell separation filter
US-2021380928-A1 · Dec 9, 2021 · US
Magnesium ion selective pvc membranes
US-2021262972-A1 · Aug 26, 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 B01D71/301?
- CPC B01D71/301 is the Cooperative Patent Classification code for “Polyvinylchloride.”
- How many patents are filed under CPC B01D71/301 (Polyvinylchloride)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/301 growing?
- Publication counts under this code: 4 in 2023 vs 5 in 2024 (latest complete years).