Semipermeable membrane
US4272378A · kind A · utility
8Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1979 |
| Grant date | Jun 9, 1981 |
| Priority date | — |
| Expiry date | Jan 3, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2033/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the preparation of a semipermeable membrane which comprises exposing porous shaped articles of polyacrylonitrile or copolymers thereof containing acrylonitrile in an amount of more than 40% by mole to a plasma. The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.