Large pore synthetic polymer membranes
US5979670A · kind A · utility
23Cited by
35References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jun 11, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The technique of synthesis involves exposure of the cast membrane to humid air to create large surface pores on the exposed side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.