Patents by Inventor Chae Young Ryu

Chae Young Ryu 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).

  • Intermediates for optically active piperidine derivatives and preparation methods thereof
    Patent number: 11780810
    Abstract: A preparation method according to the present invention makes it possible to industrially produce large amounts of highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield by use of commercially available reagents and solvents. In addition, the use of novel intermediates according to the present invention makes it possible to produce highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield.
    Type: Grant
    Filed: January 7, 2022
    Date of Patent: October 10, 2023
    Inventors: Jae Hong Kweon, Eun Sun Kim, Hyuk Woo Lee, Dong Hyun Ko, Chae Young Ryu, Kwang Do Choi, SeungPyeong Heo
  • Intermediates for Optically Active Piperidine Derivatives and Preparation Methods Thereof
    Publication number: 20220127230
    Abstract: A preparation method according to the present invention makes it possible to industrially produce large amounts of highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield by use of commercially available reagents and solvents. In addition, the use of novel intermediates according to the present invention makes it possible to produce highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield.
    Type: Application
    Filed: January 7, 2022
    Publication date: April 28, 2022
    Inventors: Jae Hong Kweon, Eun Sun Kim, Hyuk Woo Lee, Dong Hyun Ko, Chae Young Ryu, Kwang Do Choi, SeungPyeong Heo
  • Intermediates for optically active piperidine derivatives and preparation methods thereof
    Patent number: 11254641
    Abstract: A preparation method according to the present invention makes it possible to industrially produce large amounts of highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield by use of commercially available reagents and solvents. In addition, the use of novel intermediates according to the present invention makes it possible to produce highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: February 22, 2022
    Assignee: HK inno.N Corporation
    Inventors: Jae Hong Kweon, Eun Sun Kim, Hyuk Woo Lee, Dong Hyun Ko, Chae Young Ryu, Kwang Do Choi, SeungPyeong Heo
  • Intermediates for Optically Active Piperidine Derivatives and Preparation Methods Thereof
    Publication number: 20210107873
    Abstract: A preparation method according to the present invention makes it possible to industrially produce large amounts of highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield by use of commercially available reagents and solvents. In addition, the use of novel intermediates according to the present invention makes it possible to produce highly pure optically active tert-butyl 3-methyl-4-oxopiperidine-1-carboxylate in high yield.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 15, 2021
    Inventors: Jae Hong Kweon, Eun Sun Kim, Hyuk Woo Lee, Dong Hyun Ko, Chae Young Ryu, Kwang Do Choi, SeungPyeong Heo