Patents by Inventor Hyun Ju WON

Hyun Ju WON 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 for purifying 1,4-diaminobutane
    Patent number: 10450262
    Abstract: A method for purifying 1,4-diaminobutane comprising the steps of: separating a second composition including carbonate salt of 1,4-diaminobutane from a first composition including carbonate salt of 1,4-diaminobutane by distillation; and removing carbonate from carbonate salt of 1,4-diaminobutane included in the second composition to recover 1,4-diaminobutane.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: October 22, 2019
    Assignee: CJ CHEILJEDANG CORPORATION
    Inventors: Won Sik Gwak, Hong Xian Li, Hyun Ju Won, Hyo Hyoung Lee, Kyung Su Na, Su Jin Park, Young Lyeol Yang, Hye Won Um, Chang Yub Oh, Kyoung Min Lee
  • METHOD FOR PURIFYING 1,4-DIAMINOBUTANE
    Publication number: 20180127351
    Abstract: A method for purifying 1,4-diaminobutane comprising the steps of: separating a second composition including carbonate salt of 1,4-diaminobutane from a first composition including carbonate salt of 1,4-diaminobutane by distillation; and removing carbonate from carbonate salt of 1,4-diaminobutane included in the second composition to recover 1,4-diaminobutane.
    Type: Application
    Filed: May 4, 2016
    Publication date: May 10, 2018
    Inventors: Won Sik GWAK, Hong Xian LI, Hyun Ju WON, Hyo Hyoung LEE, Kyung Su NA, Su Jin PARK, Young Lyeol YANG, Hye Won UM, Chang Yub OH, Kyoung Min LEE
  • Refining method of organic amine
    Patent number: 9963421
    Abstract: Provided are a method of refining a reaction solution including a carbonate of 1,5-diaminopentane, which is produced by fermentation, through a decarbonation step and a pH adjustment step, and 1,5-diaminopentane which is refined by the above method.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: May 8, 2018
    Assignee: CJ CHEILJEDANG CORP.
    Inventors: Won Sik Gwak, Hyun Ju Won, Hideki Murata, Chong Ho Lee
  • REFINING METHOD OF ORGANIC AMINE
    Publication number: 20170015616
    Abstract: Provided are a method of refining a reaction solution including a carbonate of 1,5-diaminopentane, which is produced by fermentation, through a decarbonation step and a pH adjustment step, and 1,5-diaminopentane which is refined by the above method.
    Type: Application
    Filed: March 19, 2015
    Publication date: January 19, 2017
    Inventors: Won Sik GWAK, Hyun Ju WON, Hideki MURATA, Chong Ho LEE