Chloroquine gel and preparation method and application thereof
US11564891B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 2021 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Oct 7, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/30
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A product for preventing and treating external genitalia infection and/or flat warts is provided, wherein the product comprises a chloroquine nanosphere. The chloroquine nanosphere comprises a water-soluble nanosphere carrier, and chloroquine or a chloroquine derivative. A mass ratio of the chloroquine or the chloroquine derivative to the water-soluble nanosphere carrier during preparation ranges from 1:3 to 1:5. A loading rate of the chloroquine or the chloroquine derivative in the prepared chloroquine nanosphere ranges from 3.0% to 21.6%. The water-soluble nanosphere carrier is water-soluble chitosan; a deacetylation degree of the water-soluble chitosan ranges from 80% to 95%, and a viscosity-average molecular weight thereof ranges from 3000 to 5000 g/mol. The chloroquine derivative is selected from one or more of hydroxychloroquine, chloroquine phosphate or chloroquine sulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.