Topical compositions containing low molecular weight chitosan derivatives
US11344507B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 7, 2020 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Jan 7, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed are topical composition for delivery of an active agent to keratinous tissue, comprising a low molecular weight chitosan that is covalently modified chitosan with octane sulfonic acid which are attached to the chitosan via sulfonamide linkages (OsC), an effective amount of an active agent, and a carrier, and wherein the chitosan has a molecular weight of about 50 kD to about 150 kD. Also disclosed are methods of making the compositions and methods of using the compositions that entail topical application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.