Filter media and method of making same
US4645567A · kind A · utility
28Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Apr 11, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for production of anionically charged filter media sheet including pretreatment of filter elements with cationic charge modifier, preferably, employing inorganic colloidal silica charge modifiers. The resulting filters are used for the removal of haze or haze formers from beverages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.