Filter sheet
US4859340A · kind A · utility
50Cited by
17References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Apr 21, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter media sheet comprising fine particulate and a self-bonding matrix of cellulose fiber, the surfaces of at least one of which are modified with a polyamido-polyamine epichlorhydrin cationic resin, the matrix incorporating beaten cellulose fiber to provide a Canadian Standard Freeness of less than 600 ml.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.