Filter membrane and method of manufacture
US5238569A · kind A · utility
22Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jul 24, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/62
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane for a filter device or a device for gas or liquid separation, the membrane being constituted by a porous structure made of at least one material selected from sintered ceramic, sintered metals, microporous carbon, microporous glass, and polymers, said structure including at least one microporous layer, wherein the entire outside surface and inside surface of the pores of said structure is covered by a thin and continuous film of a polyphosphazene, the thickness of said film lying in the range 0.01% to 10% of the mean diameter of the pores of said microporous layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.