Metal colloid solution
US7745499B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Jul 16, 2004 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/30
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A colloid solution that exhibits storage stability and pH stability, being useful as viral substitute particles for use in an integrity test for virus removal membrane. In particular, a metal colloid solution characterized in that it comprises metal particles or metal compound particles of 1 to 100 nm average diameter, a water soluble high-molecular-weight dispersant having an N group and water and/or a water soluble organic solvent, the metal colloid solution being stable for a prolonged period of time and being stable in at least pH values ranging from 4 to 11.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.