Patents by Inventor Chang Ho Byeon

Chang Ho Byeon 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).

  • Patent number: 10065933
    Abstract: The present disclosure relates to a novel method for preparing high-purity gadobutrol. The present disclosure can be easily applied to a large scale production because purity of intermediate can be managed via simple and mild process and accordingly, high-purity or ultra high-purity gadobutrol that has higher purity than previous gadobutrol can be prepared in high yield therethrough.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: September 4, 2018
    Assignee: ST PHARM CO., LTD.
    Inventors: Geun Jho Lim, Sun Ki Chang, Chang Ho Byeon, Hoe Jin Yoon, Moon Soo Kim
  • Publication number: 20170342038
    Abstract: The present disclosure relates to a novel method for preparing high-purity gadobutrol. The present disclosure can be easily applied to a large scale production because purity of intermediate can be managed via simple and mild process and accordingly, high-purity or ultra high-purity gadobutrol that has higher purity than previous gadobutrol can be prepared in high yield therethrough.
    Type: Application
    Filed: December 28, 2015
    Publication date: November 30, 2017
    Applicant: ST PHARM CO., LTD.
    Inventors: Geun Jho LIM, Sun Ki CHANG, Chang Ho BYEON, Hoe Jin YOON, Moon Soo Kim
  • Patent number: 9822084
    Abstract: Disclosed is a novel method of preparing highly pure calcobutrol using an intermediate (butrol) of gadobutrol without using highly pure gadobutrol. This method is capable of obtaining calcobutrol at high purity and high yield through a simple and environmentally friendly process, and thus can be easily applied to mass production.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: November 21, 2017
    Assignee: ST PHARM CO., LTD.
    Inventors: Geun Jho Lim, Sun Ki Chang, Chang Ho Byeon, Hoe Jin Yoon, Moon Soo Kim
  • Publication number: 20170260148
    Abstract: Disclosed is a novel method of preparing highly pure calcobutrol using an intermediate (butrol) of gadobutrol without using highly pure gadobutrol. This method is capable of obtaining calcobutrol at high purity and high yield through a simple and environmentally friendly process, and thus can be easily applied to mass production.
    Type: Application
    Filed: September 7, 2015
    Publication date: September 14, 2017
    Inventors: Geun Jho LIM, Sun Ki CHANG, Chang Ho BYEON, Hoe Jin YOON, Moon Soo KIM
  • Patent number: 9006436
    Abstract: The present invention provides a method which enables the simple, economical and high-yield production which is a key intermediate of antidiabetic drug Januvia.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: April 14, 2015
    Assignee: ST Pharm Co., Ltd.
    Inventors: Geun Gho Lim, Sun Ki Chang, Chang Ho Byeon
  • Publication number: 20140005394
    Abstract: The present invention provides a method which enables the simple, economical and high-yield production which is a key intermediate of antidiabetic drug Januvia.
    Type: Application
    Filed: January 18, 2012
    Publication date: January 2, 2014
    Applicant: ST PHARM CO., LTD
    Inventors: Geun Gho Lim, Sun Ki Chang, Chang Ho Byeon