Porous membrane
US11161069B2 · kind B2 · utility
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11Claims
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Assignee
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Key dates
| Filing date | Apr 10, 2020 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Apr 10, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a porous membrane which has a high water permeability performance, a high blocking performance, and a durability performance against loads of long-term and high operation pressures, which are suitable for filtering applications. The porous membrane includes one surface to be on a side of a filtrate; and the other surface to be on a side of a liquid to be filtered, wherein a surface pore diameter index of the one surface is 2.5 or more, the surface pore diameter index being determined by dividing a pore diameter in a top surface by a pore diameter in a second top surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.