Composite semipermeable membrane
US12138595B2 · kind B2 · utility
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3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2022 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Apr 22, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/131
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a composite semipermeable membrane including: a support membrane; and a separation functional layer provided on the support membrane, in which the separation functional layer comprises a plurality of protrusions formed of a thin membrane, and at least a part of the plurality of protrusions has a ratio (Wa/Wb) of larger than 1.3 in cross sections at arbitrary ten positions each having a length of 2.0 μm in a membrane surface direction of the support membrane, provided that Wa is a maximum width of the protrusion and Wb is a root width of the protrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.