pH reducing formulation and delivery system for a tampon

Details pH reducing formulation and delivery system for a tampon pH reducing formulation and delivery system for a tampon

2006-11-21

2006-11-21

Zalukaeva, Tatyana (Department: 3761)

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

C604S359000, C604S367000, C604S904000

Reexamination Certificate

active

07138559

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.

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Examiner's Fig. A depicting positioning of tampon layers.

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