Porous membrane including perfluoroalkoxy alkane (PFA)-based melt-extruded film and having pores controlled by biaxial stretching, and manufacturing method therefor
US-12521694-B2 · Jan 13, 2026 · US
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Polyvinylethers
Polyvinylethers · 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 | B01D71/382 |
| Official title | {Polyvinylethers} |
| Display label | Polyvinylethers |
| Total patents | 7 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be growing based on the most recent years.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2021 | 2 |
| 2023 | 1 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Functional fluoropolymers
US-2025179230-A1 · Jun 5, 2025 · US
Functional fluoropolymers
US-12209152-B2 · Jan 28, 2025 · US
Porous membrane including perfluoroalkoxy alkane (pfa)-based melt-extruded film and having pores controlled by biaxial stretching, and manufacturing method therefor
US-2023381742-A1 · Nov 30, 2023 · US
Polyvinylidene fluoride resin-made porous membrane and method for producing same
US-2021362100-A1 · Nov 25, 2021 · US
Functional fluoropolymers
US-2021163647-A1 · Jun 3, 2021 · US
Method of forming a hydrophilic membrane
US-9393529-B2 · Jul 19, 2016 · US