pH reducing formulation and delivery system for a tampon
US7138559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2003 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Oct 14, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S604/904
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A formulation effective in reducing the pH in a menstruating vagina or in a tampon inserted therein to below pH 5.5, comprising (a) 3–80% by weight of a solid organic acid polymer; (b) 92–15% by weight of a solid organic acid; and (c) 5–30% of a wetting agent. Also disclosed is a delivery system for releasing an active agent comprising: (a) a deposition comprising the active agent; and (b) a polymeric support on which the deposition is deposited. The delivery system is especially useful in a catamenial tampon for insertion in a human vagina which comprises (a) an inner core comprising an absorbent material; (b) an outer layer comprising a liquid permeable material; and (c) the delivery system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.