Coated membranes
US4250029A · kind A · utility
48Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1977 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Apr 25, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1216
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel membranes having two or more coatings of polyelectrolytes with at least one oppositely charged adjacent pair of coatings separated by a neutral layer to reduce charge neutralization, their method of preparation, and use for rejecting ionically charged solutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.