Charge-based water filtration systems
US7625492B2 · kind B2 · utility
5Cited by
34References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2004 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jul 22, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Generally, systems for air and water purification using unpowered charged sorbent mediums (3) which may include layered double hydroxide (LDH) (1) compositions, lignin (2), and methods of sorbing inorganic or organic material(s) onto such mediums, including anionic contaminants (10), cationic contaminants (11), non ionic organic contaminants (20), and even biological agents (7) such as bacteria or viruses present in liquids or gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.