Patents by Inventor Jae Kyeong Kim

Jae Kyeong Kim 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).

  • System and method for recycling high-boiling-point waste photoresist stripper
    Patent number: 8961744
    Abstract: In a system and method for recycling a high-boiling-point waste photoresist stripper generated in processes of manufacturing LCDs or semiconductor devices, an expensive high-boiling-point stripper solvent can be easily recycled at high yield and high-purity electronic grade.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: February 24, 2015
    Assignee: Korex Corporation
    Inventors: Ho Kyung Lee, In Gyoo Lee, Myung Jun Park, Kee-Kahb Koo, Jae-Kyeong Kim
  • Preparation of iron(II) acetate powder from a low grade magnetite
    Patent number: 7550618
    Abstract: The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. According to the present invention, it is possible to obtain high purity iron(II) acetate using low grade magnetite and there are advantages of mass producible environmentally-friendly simple process and prevention of corrosion of facilities.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: June 23, 2009
    Assignee: Korea Institute of Geoscience & Mineral Resources
    Inventors: Hee Dong Jang, Yong Jae Suh, Dae Sup Kil, Kee Kahb Koo, Jae Kyeong Kim, Han Sang Oh
  • PREPARATION OF IRON (II) ACETATE POWDER FROM A LOW GRADE MAGNETITE
    Publication number: 20090105493
    Abstract: The present invention relates to a preparation of iron(II) acetate powder from low grade magnetite and comprises the following steps: (a) adding organic acid to low grade magnetite powder to obtain iron solution; (b) adding hydroxide to the iron solution to obtain iron hydroxide; and (c) adding acetic acid to the iron hydroxide, thereby obtaining iron(II) acetate. According to the present invention, it is possible to obtain high purity iron(II) acetate using low grade magnetite and there are advantages of mass producible environmentally-friendly simple process and prevention of corrosion of facilities.
    Type: Application
    Filed: December 20, 2007
    Publication date: April 23, 2009
    Applicant: KOREA INSTITUTE OF GEOSCIENCE & MINERAL RESOURCES
    Inventors: Hee Dong Jang, Yong Jae Suh, Dae Sup Kil, Kee Kahb Koo, Jae Kyeong Kim, Han Sang Oh