Composite membrane and moisture adjustment module using same
US-9853305-B2 · Dec 26, 2017 · US
Polyvinylalcohol
Polyvinylalcohol · 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 | B01D71/381 |
| Official title | {Polyvinylalcohol} |
| Display label | Polyvinylalcohol |
| Total patents | 240 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 21 |
| 2016 | 25 |
| 2017 | 23 |
| 2018 | 24 |
| 2019 | 30 |
| 2020 | 27 |
| 2021 | 17 |
| 2022 | 23 |
| 2023 | 17 |
| 2024 | 16 |
| 2025 | 16 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing acid gas separation composite membrane, and acid gas separation membrane module
US-9839882-B2 · Dec 12, 2017 · US
Facilitated CO2 transport membrane, method for producing same, resin composition for use in method for producing same, CO2 separation module and method and apparatus for separating CO2
US-9833746-B2 · Dec 5, 2017 · US
Microporous polyolefin film, separator for battery, and production processes therefor
US-2017274329-A1 · Sep 28, 2017 · US
Moisture permeable filter medium
US-9770692-B2 · Sep 26, 2017 · US
Aluminum oxide supported gas permeable membranes
US-2017239624-A1 · Aug 24, 2017 · US
Composition for co2 gas separation membrane, co2 gas separation membrane and method for producing same, and co2 gas separation membrane module
US-2017232398-A1 · Aug 17, 2017 · US
Forward osmosis membrane and forward osmosis treatment system
US-2017225131-A1 · Aug 10, 2017 · US
Microporous articles with a three-dimensional porous network of acid-sintered interconnected silica nanoparticles and methods of making the same
US-2017173535-A1 · Jun 22, 2017 · US
Hemodialyzer for blood purification
US-2017165615-A1 · Jun 15, 2017 · US
Separation membrane, method for preparing the same and unit for purification
US-9636640-B2 · May 2, 2017 · US
Hollow fiber membrane module and manufacturing method thereof
US-2017072371-A1 · Mar 16, 2017 · US
Membranes for gas separation
US-2017056839-A1 · Mar 2, 2017 · US
Electrospun cactus mucilage nanofibers
US-9555392-B2 · Jan 31, 2017 · US
Purification of (meth)acrylic esters by membrane separation dehydration
US-2016376217-A1 · Dec 29, 2016 · US
Separation membrane for water treatment and production method for same
US-9527042-B2 · Dec 27, 2016 · US
Membranes comprising graphene
US-2016354729-A1 · Dec 8, 2016 · US
High flux high efficiency nanofiber membranes and methods of production thereof
US-9511329-B2 · Dec 6, 2016 · US
Double crosslinked sodium alginate/polyvinyl alcohol composite nanofiltration membrane and preparation method thereof
US-2016339395-A1 · Nov 24, 2016 · US
Moisture permeable filter medium
US-2016325238-A1 · Nov 10, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/381?
- CPC B01D71/381 is the Cooperative Patent Classification code for “Polyvinylalcohol.”
- How many patents are filed under CPC B01D71/381 (Polyvinylalcohol)?
- Our database includes 240 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/381 growing?
- Publication counts under this code: 16 in 2024 vs 16 in 2025 (latest complete years).