Coated porous polymeric membranes
US11285443B2 · kind B2 · utility
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13Claims
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Assignee
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Key dates
| Filing date | May 26, 2017 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Jun 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure provides a porous polymeric membrane that is coated with a cross-linked polymerized monomer. The coating on the porous polymeric membrane has a charge when it is immersed in an organic liquid. The coated porous polymeric membrane, a filter utilizing the membrane, and a method for treating an organic liquid used for photoresist with the coated porous polymeric membrane to remove metal contaminants from the organic liquid are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.