Patents by Inventor Ja Woon Gu

Ja Woon Gu 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).

  • Method of producing nano-size graphene-based material and an equipment for producing the same
    Patent number: 8968695
    Abstract: The present invention is directed to a method of producing nano-size graphene-based material and an equipment for producing the same. The present invention provides a method of producing graphitic oxide by forcing graphite sulfuric slurry and KMnO4 sulfuric solution into a lengthy micro-channel and by sustaining the mixture of the said graphite sulfuric slurry and the said KMnO4 sulfuric solution in the said micro-channel at predetermined temperatures, by putting the said aqua solution of hydrogen peroxide to the reaction mixture to terminate oxidation, and by washing and drying the reaction mixture. The present invention provides a method of producing nano-size graphene-based material by exfoliating graphitic oxide by thermal shock in a vertical fluidized furnace.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: March 3, 2015
    Assignee: IDT International Co., Ltd.
    Inventors: Young Jin Kwon, Ja Woon Gu, Won Hyung Park, Cheol Min Shin, Byoung Kyu Ji, Doo Hyo Kwon
  • METHOD OF PRODUCING NANO-SIZE GRAPHENE-BASED MATERIAL AND AN EQUIPMENT FOR PRODUCING THE SAME
    Publication number: 20120201738
    Abstract: The present invention is directed to a method of producing nano-size graphene-based material and an equipment for producing the same. The present invention provides a method of producing graphitic oxide by forcing graphite sulfuric slurry and KMnO4 sulfuric solution into a lengthy micro-channel and by sustaining the mixture of the said graphite sulfuric slurry and the said KMnO4 sulfuric solution in the said micro-channel at predetermined temperatures, by putting the said aqua solution of hydrogen peroxide to the reaction mixture to terminate oxidation, and by washing and drying the reaction mixture. The present invention provides a method of producing nano-size graphene-based material by exfoliating graphitic oxide by thermal shock in a vertical fluidized furnace.
    Type: Application
    Filed: August 11, 2009
    Publication date: August 9, 2012
    Applicant: N-BARO TECH CO., LTD
    Inventors: Young Jin Kwon, Ja Woon Gu, Won Hyung Park, Cheol Min Shin, Byoung Kyu Ji, Doo Hyo Kwon
  • Tweezers
    Patent number: D718498
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: November 25, 2014
    Assignee: Shine Co., Ltd
    Inventor: Ja-Woon Gu