Crystalline methylthioninium chloride hydrates
US8765742B2 · kind B2 · utility
23Cited by
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14Claims
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Key dates
| Filing date | Sep 23, 2010 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Mar 25, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/30
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Three dihydrate forms B, C and D and a monohydrate form E of methylthioninium chloride are described. Forms B, C, D and E can be prepared under controlled humidity and temperature from methylthioninium chloride with higher water content or conversion of a hydrate. The hydrates can be incorporated in pharmaceutical compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.