Mechanically stable ultrafiltration membrane, and method for producing same
US-12318734-B2 · Jun 3, 2025 · US
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Cellulose ethers
Cellulose ethers · 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 | B01D71/22 |
| Official title | Cellulose ethers |
| Display label | Cellulose ethers |
| Total patents | 24 |
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 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydrophilic porous membrane and method for producing hydrophilic porous membrane
US-12263451-B2 · Apr 1, 2025 · US
Hydrophilic porous membrane and method for producing hydrophilic porous membrane
US-12005401-B2 · Jun 11, 2024 · US
Gas detector
US-11940432-B2 · Mar 26, 2024 · US
Porous membrane and filter cartridge
US-11819807-B2 · Nov 21, 2023 · US
Separation membrane and method for producing separation membrane
US-11794150-B2 · Oct 24, 2023 · US
Separation membrane and method for producing separation membrane
US-2023053706-A1 · Feb 23, 2023 · US
Mechanically stable ultrafiltration membrane, and method for producing same
US-2022410081-A1 · Dec 29, 2022 · US
Method for manufacturing gas separation membrane and gas separation membrane manufactured thereby
US-11241659-B2 · Feb 8, 2022 · US
Cell separation filter, filtering device, and manufacturing method for cell separation filter
US-2021380928-A1 · Dec 9, 2021 · US
Hydrophilic porous membrane and method for producing hydrophilic porous membrane
US-2021370238-A1 · Dec 2, 2021 · US
Methods of making high selectivity facilitated transport membranes, high selectivity facilitated transport membrane elements and modules
US-11083992-B2 · Aug 10, 2021 · US
Gas detector
US-2021164951-A1 · Jun 3, 2021 · US
Hydrophilic porous membrane and method for producing hydrophilic porous membrane
US-2021086139-A1 · Mar 25, 2021 · US
Porous membrane and filter cartridge
US-2021023510-A1 · Jan 28, 2021 · US
Method for manufacturing gas separation membrane and gas separation membrane manufactured thereby
US-2020238219-A1 · Jul 30, 2020 · US
Methods of making high selectivity facilitated transport membranes, high selectivity facilitated transport membrane elements and modules
US-2020101416-A1 · Apr 2, 2020 · US
Electron beam induced modification of membranes by polymers
US-10471394-B2 · Nov 12, 2019 · US
Porous polymer flat-sheet membrane
US-9550153-B2 · Jan 24, 2017 · US
Crosslinked cellulosic membranes
US-9254466-B2 · Feb 9, 2016 · US