High purity butoconazole nitrate with specified particle size and a process for the preparation thereof
US7625935B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Aug 1, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
One object of the invention is high purity butoconazole nitrate of the formula (I) (I) containing maximum 0.1 wt % of chemical impurities, wherein at least 95% of the particles of the substance are below 75 μm by diameter, whereas at least 99% of the particles are below 250 μm by diameter, and process for its preparation. A pharmaceutical composition comprising as active ingredient, high purity butoconazole nitrate of specified particle size in admixture with known auxiliaries is also within the scope of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.