Paper filter for removing metal cations
US5718827A · kind A · utility
9Cited by
40References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1995 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Mar 29, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disposable paper filters suitable for removal of contaminants from fluids such as water or air are disclosed. Specific embodiments include single-ply and multi-ply filters in which metal removal additives and/or halogen and organic contaminant removal additives have been distributed during the manufacturing process. Special manufacturing methods for producing such composite filters are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.