Anti-cancer therapy agent of arsenic hexoxide (As4O6) of a natural chemical substance and its pharmaceutical composition
US7261906B2 · kind B2 · utility
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Key dates
| Filing date | May 16, 2003 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Dec 2, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P35/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing As4O6 comprises successively heating and cooling a mixture of natural Sinsuk and 40% alcohol in a ratio of about 1: about 1 for about 1 to about 2 hour(s) resulting in a product, successively washing the product with distilled water thereby forming washed precipitates, maintaining the washed precipitates at about −40° C. for 24 hours, defrosting, filtering, and drying the precipitates, and successively heating and cooling the precipitates to obtain the final As4O6 product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.