Composite porous membrane and process for producing the same
US8999167B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2004 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Oct 23, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is provided a composite porous membrane comprising a porous membrane comprised of an organic polymeric compound, and a supporting porous membrane adjacent to the porous membrane, characterized in that the organic polymeric compound constituting the porous membrane penetrates in at least part of a surface adjacent to porous membrane of the supporting porous membrane, the porous membrane having specified opening ratio, average pore diameter, standard deviation of pore diameter, ratio of through pore, average membrane thickness, standard deviation of membrane thickness and internal structure, and that the supporting porous membrane has communicating pores of 0.5 D μm or greater average pore diameter. Further, there are provided a blood filtration membrane comprising the composite porous membrane; a leukocyte removing filter unit comprising the composite porous membrane as a second filter; and, utilizing the composite porous membrane, a cell culturing diaphragm and method of cell culturing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.