Fibrous filter medium and process
US4007114A · kind A · utility
70Cited by
2References
3Claims
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 primaryB01D2239/1233
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved filter media comprised of negatively charged high surface area fibrous filter material the surface of which is modified by treatment with a melamine-formaldehyde cationic colloid, processes for the production thereof, and use in liquid filtration to remove submicron contaminants including negatively charged particles. Glass microfiber treated with Parez 607 colloid is preferred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.