Patents by Inventor In-sool Cho

In-sool Cho has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6913025
    Abstract: The present invention relates to a callus-removing skin-file capable of removing fingernails, toenails, calluses and the like and a method of manufacturing the same. The callus removing file 21, comprises a base plate 24 made of glass, an abrasive layer 23 formed on the base plate by sanding; and a coating layer 22 coated on the upper surface of the abrasive layer 23 with a mixture of epoxy resin, a hardening agent and emery. The method of manufacturing the callus-removing skin-file includes the steps of: preparing a base plate 24 made from glass material; making a mixture by mixing 20 to 25 percent by weight epoxy resin, a 40 to 55 percent by weight hardening agent and 15 to 20 percent by weight emery; forming an abrasive layer 23 by sanding a surface of the base plate 24; coating the mixture on the upper surface of the sanded base plate; and hardening the base plate 24 coated with the mixture.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: July 5, 2005
    Inventor: In-sool Cho
  • Publication number: 20030172945
    Abstract: The present invention relates to a callus-removing skin-file capable of removing fingernails, toenails, calluses and the like and a method of manufacturing the same. The callus removing file 21, comprises a base plate 24 made of glass, an abrasive layer 23 formed on the base plate by sanding; and a coating layer 22 coated, on the upper surface of the abrasive layer 23 with a mixture of epoxy resin, a hardening agent and emery. The method of manufacturing the callusing removing skin-file includes the steps of: preparing a base plate 24 made from glass material; making a mixture by mixing 20 to 25 percent by weight epoxy resin, a 40 to 55 percent by weight hardening agent and 15 to 20 percent by weight emery; forming an abrasive layer 23 by sanding a surface of the base plate 24; coating the mixture on the upper surface of the sanded base plate; and hardening the base plate 24 coated with the mixture.
    Type: Application
    Filed: February 24, 2003
    Publication date: September 18, 2003
    Inventor: In-sool Cho