Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Web – sheet or filament bases; compositions of bandages; or...
Reexamination Certificate
1999-02-02
2001-06-05
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Web, sheet or filament bases; compositions of bandages; or...
C424S448000
Reexamination Certificate
active
06241998
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a dermatological patch for the removal of keratotic plugs from human skin, and a method for the use of the dermatological patch. In particular, the invention is concerned with a dermatological patch having a polymeric adhesive composition, and a method of removing keratotic plugs from the skin utilizing such a dermatological patch.
Keratotic plugs are dead epidermal cells combined with sebaceous matter and dirt which form within skin pores, and result in conspicuously enlarged and/or darkened pores. If keratotic plugs are not periodically removed from the skin, not only do pores enlarge and darken, but further dermatological irritation may occur resulting in reddening blemishes or bacterial infections of the skin. Thus, removal of keratotic plugs improves the health and appearance of the skin.
A previously described method for removing keratotic plugs comprises applying a keratotic plug remover composition onto the skin, and peeling off the composition after the composition is dried. Use of a moistened composition may be awkward and uncomfortable for the user, and also the packaging of such a product is complex. The techniques and technology have been discussed in U.S. Pat. No. 5,512,277 (Uemura), which is incorporated by reference herein.
There is a need to provide a dermatological patch for the removal of keratotic plugs from the skin which minimizes the disadvantages of known systems.
SUMMARY OF THE INVENTION
The invention provides a dermatological patch which has advantages over known systems for removing keratotic plugs from the skin. There is also provided a method for removing keratotic plugs from the skin utilizing the dermatological patch.
According to the invention, there is provided a dermatological patch for removing keratotic plugs from the skin. The patch comprises a pad, having an upper and lower surface area, and a polymeric adhesive composition on the lower surface area of the pad for adhering to skin and removing keratotic plugs. The pad is a substrate which is preferably flexible and not microporus. The polymeric adhesive composition is preferably a pressure sensitive adhesive, and is selected to have a desired property of being in an active form once adhered to the pad. Premoisturization of the adhesive by a user prior to application onto the skin is not required to effect its operation.
Examples of polymeric adhesive compositions for coating the lower surface of the pad, include, but are not limited to pressure sensitive, acrylate adhesives. The adhesive operates based on its pressure sensitive characteristics, namely when applied to the skin, it can act, on removal from the skin, to remove the keratotic plugs from the skin, but not damage the skin.
In alternative embodiments, the patch can be made in a variety of shapes.
In some embodiments, the patch is used on non-hairy skin, such as the face. Examples of areas of the face upon which the patch may be used include, but are not limited to, the nose, cheeks, forehead and chin.
In a further embodiment, the patch additionally includes an additive agent.
In some embodiments, at least one of and preferably both of the pad and polymeric adhesive composition are substantially transparent or clear, a flesh-like color or shade so as to effectively blend with the skin of wearer, or translucent. In other embodiments, the pad is effectively colored or rendered ornate or patterned on its upper surface.
In one embodiment, the patch further includes a liner, secured to the patch by the adhesive, to cover the polymeric adhesive composition prior to use.
The invention also provides a method of use of the dermatological patch to remove keratotic plugs. The method comprises obtaining a dermatological patch, removing the liner to expose the adhesive surface of the patch, applying the patch to the skin with the lower surface of the pad to the skin, and removing the patch from the skin, thereby extracting the keratotic plugs from the skin. The relatively dry form of the adhesive does not require it to be premoistened before it is applied to the skin.
The invention is further described with reference to the accompanying drawings.
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Acutek International
Howard S.
Oppenheimer Wolf & Donnelly LLP
Page Thurman K.
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