Patents by Inventor Hyun-Jik Yi

Hyun-Jik Yi 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).

  • Distillation method
    Patent number: 10556191
    Abstract: By using the distillation device of the present application, energy loss occurring in a purification process of a solution including a waste stripper and a stripped photoresist resin used in a stripping process of a photoresist can be minimized and the installation cost of the distillation device can be reduced compared to the case in which dual distillation columns are used, thereby increasing the economic feasibility of a process.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: February 11, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Si Nae Lee, Sung Kyu Lee, Sang Beom Lee, Sung Ho Lee, Jeong Seok Kim, Joon Ho Shin, Dae Chul Jung, Yong Hee Jang, Tae Moon Park, Hyun Jik Yi
  • DISTILLATION DEVICE
    Publication number: 20180178141
    Abstract: By using the distillation device of the present application, energy loss occurring in a purification process of a solution including a waste stripper and a stripped photoresist resin used in a stripping process of a photoresist can be minimized and the installation cost of the distillation device can be reduced compared to the case in which dual distillation columns are used, thereby increasing the economic feasibility of a process.
    Type: Application
    Filed: April 1, 2016
    Publication date: June 28, 2018
    Inventors: Si Nae LEE, Sung Kyu LEE, Sang Beom LEE, Sung Ho LEE, Jeong Seok KIM, Joon Ho SHIN, Dae Chul JUNG, Yong Hee JANG, Tae Moon PARK, Hyun Jik YI
  • Process for the preparation of HMG-COA reductase inhibitors and intermediates thereof
    Patent number: 8476432
    Abstract: The present invention provides an improved process for preparing HMG-CoA reductase inhibitors such as rosuvastatin calcium, fluvastatin sodium, and pitavastatin calcium under a mild condition, using a novel amide-bond-containing compound having R2—N—O—R1 moiety as a key intermediate. And also, the present invention provides the novel compound, an intermediate useful for the preparation thereof, and a process for the preparation thereof.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: July 2, 2013
    Assignee: Yuhan Corporation
    Inventors: Hyun Ju, Sang-Sun Joung, Hyun-Jik Yi, Ja-Heouk Khoo, Jong-Chul Lim, Jae-Gyu Kim
  • PROCESS FOR THE PREPARATION OF HMG-COA REDUCTASE INHIBITORS AND INTERMEDIATES THEREOF
    Publication number: 20130096303
    Abstract: The present invention provides an improved process for preparing HMG-CoA reductase inhibitors such as rosuvastatin calcium, fluvastatin sodium, and pitavastatin calcium under a mild condition, using a novel amide-bond-containing compound having R2—N—O—R1 moiety as a key intermediate. And also, the present invention provides the novel compound, an intermediate useful for the preparation thereof, and a process for the preparation thereof.
    Type: Application
    Filed: June 30, 2011
    Publication date: April 18, 2013
    Inventors: Hyun Ju, Sang-Sun Joung, Hyun-Jik Yi, Ja-Heouk Khoo, Jong-Chul Lim, Jae-Gyu Kim