Patents by Inventor Jun Chul Cho

Jun Chul 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).

  • Oil-in-water type cosmetic composition containing retinoids stabilized by a liquidcrystal
    Patent number: 5980917
    Abstract: Disclosed herein is an oil-in-water type cosmetic composition containing retinoids stabilized within a core of a liquidcrystal formed by a surfactant having a phase transition temperature of 45.degree. C. or higher and a bulky structure.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: November 9, 1999
    Assignee: Pacific Corporation
    Inventors: Hak Hee Kang, Jun Chul Cho, Jung Su Kim, Ok Sob Lee
  • Water-in-stable L-ascorbic acid derivative and a method for preparation thereof, and a skin-whitening cosmetic composition containing the same
    Patent number: 5916915
    Abstract: Disclosed herein are a L-ascorbic acid derivative having an improved water-in-stability, represented by a following general formula (I): ##STR1## and a method for preparation thereof, and to a skin-whitening cosmetic composition containing the same as an active ingredient.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: June 29, 1999
    Assignee: Pacific Corporation
    Inventors: Jong Eon Hong, Ki Hwa Lee, Jun Chul Cho, Jang Sob Lee, Jung No Lee, Ji Min Chun, Dong Il Jang, Ok Sob Lee, Sang Rhin Lee