Filtration membranes and method of making the same
US4964990A · kind A · utility
28Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1990 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Jan 10, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Microporous membranes can be prepared which comprise a polymer which is a hydrophobic polymer in bulk form and which has an equilibrium water absorption from about 2% to about 4%, but is hydrophilic when precipitated as a membrane. The membranes are further characterized by high water flow rates at any given bubble point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.