Patents Assigned to KOREX CORPORATION
  • Patent number: 9168468
    Abstract: In a system for recycling a high-boiling-point waste photoresist stripper generated in processes of manufacturing LCDs or semiconductor devices, wherein an expensive high-boiling-point stripper solvent can be easily recycled at high yield and high-purity electronic grade. This system includes a first distillation device for removing low-boiling-point impurities, a second distillation device for recycling a stripper solvent composition while removing high-boiling-point impurities, a third distillation device for removing trace water, thus recovering the stripper solvent composition, a fourth distillation device for additionally recycling a stripper solvent, thus additionally recovering a high-boiling-point stripper solvent, and a fifth distillation device for sequentially and separately recovering the stripper solvent composition recovered by the second distillation device and the high-boiling-point stripper solvent additionally recovered by the fourth distillation device.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: October 27, 2015
    Assignee: KOREX CORPORATION
    Inventors: Ho Kyung Lee, In Gyoo Lee, Myung Jun Park, Kee-Kahb Koo, Jae-Kyeong Kim
  • 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
  • Publication number: 20140238840
    Abstract: This invention relates to a system and method for recycling a high-boiling-point waste photoresist stripper generated in processes of manufacturing LCDs or semiconductor devices, wherein an expensive high-boiling-point stripper solvent can be easily recycled at high yield and high-purity electronic grade.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 28, 2014
    Applicant: KOREX CORPORATION
    Inventors: Ho Kyung Lee, In Gyoo Lee, Myung Jun Park, Keeg Kahb Koo, Jae Kyung Kim
  • Patent number: D793240
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: August 1, 2017
    Assignee: KOREX CORPORATION
    Inventor: Sanford Nolan Pensler
  • Patent number: D796336
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: September 5, 2017
    Assignee: KOREX CORPORATION
    Inventor: Sanford Nolan Pensler
  • Patent number: D801805
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 7, 2017
    Assignee: Korex Corporation
    Inventor: Sanford Nolan Pensler