Virus removal membrane
US10675593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2015 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Apr 10, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/444
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A virus removal membrane is formed from cellulose, in which, when a solution containing gold colloids having a diameter of 20 nm is applied through a primary surface to the virus removal membrane to allow the virus removal membrane to capture the gold colloids for measurement of brightness in a cross section of the virus removal membrane, a value obtained by dividing a standard deviation of a value of an area of a spectrum of variation in the brightness by an average of the value of the area is 0.01 or more and 1.5 or less; and a thickness of a portion, where gold colloids having a diameter of 20 nm or more and 30 nm or less are captured, in the cross section of the virus removal membrane in a wet state is 10.0 μm or more and 30.0 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.