Transparent porous membrane having hydrophilic surface and process
US4917793A · kind A · utility
61Cited by
10References
14Claims
0Family size
Inventors
Key dates
| Filing date | Dec 4, 1986 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Dec 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24998
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite, microscopically transparent, porous membrane is formed from a porous polytetrafluoroethylene membrane having desired bulk properties on which is directly coated a cross-linked polymer having desired surface properties. The composite membrane retains the porosity of the porous polymeric membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.