Water purifying method and system
US4772390A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1985 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Oct 15, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/262
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Water contaminated by small amounts of bacteria, pyrogens and low molecular weight organic compounds is treated by passing said contaminated water through a microporous polyolefin membrane having a multitude of rectangularly shaped nodule areas, each nodule area containing a plurality of strip-like microfibrils arranged in a longitudinal direction from one surface of a nodule to the side opposite said surface thereby forming a plurality of strip-like micropores in each nodule, said micropores being contiguous with each other from one surface to the other surface of the membrane thereby forming a micro-stacked structure, the mean pore diameter of said micropores ranging from 0.03 to 0.8 .mu..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.