Particulate filter medium and process
US4007113A · kind A · utility
87Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 22, 1975 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Jul 22, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1241
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved filter media comprised of negatively charged high surface area particulate filter material the surface of which is modified with a melamine-formaldehyde cationic colloid; processes for the preparation thereof; and use in liquid filtration to remove submicron contaminants including negatively charged particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.