Methods of exfoliating the skin with electricity

• US 7,477,941 B2
• Filed: 06/23/2004
• Issued: 01/13/2009
• Est. Priority Date: 06/30/2003
• Status: Expired due to Fees

• Current Assignee: Johnson & Johnson Consumer Companies Incorporated (Johnson & Johnson)
• Original Assignee: Johnson & Johnson Consumer Companies Incorporated (Johnson & Johnson)
• Inventors: Sun, Ying, Liu, Jue-Chen, Wu, Jeffrey
• Primary Examiner(s): Mendez; Manuel A
• Application Number:
  US10/874,918
• Publication Number:
  US 20050015042A1
• Time in Patent Office: 1,665 Days
• Field of Search: 604/19, 604/20, 604/21, 604/22, 604/890.1, 604/892.1, 604/500, 604/501
• US Class Current: 604/20
• CPC Class Codes: A61N 1/0428 Specially adapted for iontophoresis, e.g. AC, DC or including drug reservoirs
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/205 for promoting a biological process
• CPC Class Codes: A61N 1/30 Apparatus for iontophoresis, i.e. transfer of media in ionic state by an electromotoric force into the body, or cataphoresis
• CPC Class Codes: A61N 1/325 for iontophoresis, i.e. transfer of media in ionic state by an electromotoric force into the body electrodes for external use A61N1/0428

Abstract

The present invention features a method of exfoliating the skin by applying to skin in need of such exfoliating a device including a housing having a skin contacting surface, a first conductive electrode, a second conductive electrode, and a carrier including an agent selected from an alpha-hydroxy acid, beta-hydroxy acid, and salts thereof; wherein the first conductive electrode is in electric communication with the second conductive electrode, wherein the first conductive electrode is in ionic communication with the carrier, wherein the carrier is in communication with the skin contacting surface, and wherein the skin contacting surface is placed in contact with the skin.

Claims

1. A method of exfoliating the skin, said method comprising applying to skin in need of such exfoliating a device comprising:

a housing having a skin contacting surface;

a power source that produces conventional direct current;

a first conductive electrode that is an anode;

a second conductive electrode that is a cathode; and

a carrier comprising an agent selected from the group consisting of an alpha-hydroxy acid, beta-hydroxy acid, and salts thereof;

wherein said power source is in electric communication with said first conductive electrode and said second conductive electrode, wherein said first conductive electrode is in electric communication with said second conductive electrode, wherein said first conductive electrode and said second conductive electrode are in ionic communication with said carrier, wherein said carrier is in communication with said skin contacting surface, and wherein said skin contacting surface is placed in contact with said skin, and wherein said device is adapted to be affixed to said skin and to deliver electric current from said first conductive electrode, through said carrier, through said skin, and through said carrier to said second conductive electrode.

2. A method of claim 1, wherein said housing contains both said first conductive electrode and said second conductive electrode.

3. A method of claim 1, wherein said agent is selected from the group consisting of glycolic acid, lactic acid, citric acid, malic acid, maleic acid, and salicylic acid, and salts thereof.

4. A method of claim 3, wherein said agent is present in said carrier at a concentration of between about 0.1 to about 50% by weight of such carrier.

5. A method of exfoliating the skin, said method comprising applying to skin in need of such exfoliating a device comprising:

a housing having a skin contacting surface;

a first conductive electrode that is an anode;

a second conductive electrode that is a cathode; and

a carrier comprising an agent selected from the group consisting of an alpha-hydroxy acid, beta-hydroxy acid, and salts thereof;

wherein the difference of the standard potentials of said first conductive electrode and said second conductive electrode is at least 0.2 V, wherein the electrons that pass between said first conductive electrode and said second conductive electrode are generated as a result of said difference of the standard potentials, wherein said first conductive electrode is in electric communication with said second conductive electrode, wherein said first conductive electrode and said second conductive electrode are in ionic communication with said carrier, wherein said carrier is in communication with said skin contacting surface, and wherein said skin contacting surface is placed in contact with said skin, and wherein said device is adapted to be affixed to said skin and to deliver electric current from said first conductive electrode, through said carrier, through said skin, and through said carrier to said second conductive electrode.

6. A method of claim 5, wherein said housing is a non-woven substrate.

7. A method of claim 5, wherein said housing contains both said first conductive electrode and said second conductive electrode.

8. A method of claim 5, wherein carrier is added to said device by the user prior to application to said skin.

9. A method of exfoliating the skin, said method comprising topically applying a composition to said skin, said composition comprising a first conductive electrode that is an anode in the form of a particulate, a second conductive electrode that is a cathode coated on said particulate, and an agent selected from the group consisting of an alpha-hydroxy acid, beta-hydroxy acid, and salts thereof, wherein the difference of the standard potentials of said first conductive electrode and said second conductive electrode is at least 0.2 V and said first conductive electrode is in electric communication with said second conductive electrode.

10. A method of claim 9, wherein said first conductive electrode comprises zinc and said second conductive electrode comprises silver.

11. A method of claim 9, wherein said agent is selected from the group consisting of glycolic acid, lactic acid, citric acid, malic acid, maleic acid, and salicylic acid, and salts thereof.