Patents by Inventor Sun Youp Kang

Sun Youp Kang 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 preparing sialic acid derivative
    Patent number: 9637768
    Abstract: The present invention relates to a method for preparing a sialic acid derivative characterized by performing both of a process for preparing CMP-N-acetylneuraminic acid using N-acetyl-D-glucosamine and a process for preparing the sialic acid (neuraminic acid) derivative that combines a sialic acid with a galactose derivative or a lactose derivative, together, in one reactor. According to the method for preparing a sialic acid derivative of the present invention, expensive cytidine 5?-monophosphate (CMP) is capable of being recycled in a reactor, such that an amount of the CMP introduced into the reactor may be reduced, and the sialic acid derivative is capable of being prepared at a significantly high efficiency by using cheap N-acetyl-D-glucosamine, and pyruvate as substrates.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: May 2, 2017
    Assignee: GENECHEM INC.
    Inventors: Jin Suk Woo, Byung-Gee Kim, Dae Hee Kim, Yun Hee Choi, Jae-Kyung Song, Sun Youp Kang, Won Min Seo, Ji Young Yang, Sang Mi Lee
  • METHOD FOR PREPARING SIALIC ACID DERIVATIVE
    Publication number: 20160130621
    Abstract: The present invention relates to a method for preparing a sialic acid derivative characterized by performing both of a process for preparing CMP-N-acetylneuraminic acid using N-acetyl-D-glucosamine and a process for preparing the sialic acid (neuraminic acid) derivative that combines a sialic acid with a galactose derivative or a lactose derivative, together, in one reactor. According to the method for preparing a sialic acid derivative of the present invention, expensive cytidine 5?-monophosphate (CMP) is capable of being recycled in a reactor, such that an amount of the CMP introduced into the reactor may be reduced, and the sialic acid derivative is capable of being prepared at a significantly high efficiency by using cheap N-acetyl-D-glucosamine, and pyruvate as substrates.
    Type: Application
    Filed: May 30, 2014
    Publication date: May 12, 2016
    Inventors: Jin Suk Woo, Byung-Gee Kim, Dae Hee Kim, Yun Hee Choi, Jae-Kyung Song, Sun Youp Kang, Won Min Seo, Ji Young Yang, Sang Mi Lee
  • N-acetylglucosamine-2-epimerase and method for producing CMP-neuraminic acid using the same
    Patent number: 8852891
    Abstract: The present invention relates to a novel N-acetylglucosamine-2-epimerase and a method for preparing CMP-N-acetylneuraminic acid, more specifically, relates to a N-acetylglucosamine-2-epimerase derived from Bacteroides fragilis NCTC 9343, and a method for preparing CMP-N-acetylneuraminic acid using said N-acetylglucosamine-2-epimerase. According to the present invention, CMP-N-acetylneuraminic acid can be produced economically in a large amount through a one-step reaction using cytidine monophosphate and N-acetyl-D-glucosamine which are inexpensive substrates.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: October 7, 2014
    Assignee: Gene Chem, Inc.
    Inventors: Jin Suk Woo, Jae Kyung Sohng, Byung Gee Kim, Sun Youp Kang, Dea Hee Kim, Kyoung Soon Jang, Ji Young Yang, Young Soo Jung, Won Min Seo, Tae Geon Gil, Sang Hee Shim, In Kang Hur
  • NOVEL N-ACETYLGLUCOSAMINE-2-EPIMERASE AND METHOD FOR PRODUCING CMP-NEURAMINIC ACID USING THE SAME
    Publication number: 20110287488
    Abstract: The present invention relates to a novel N-acetylglucosamine-2-epimerase and a method for preparing CMP-N-acetylneuraminic acid, more specifically, relates to a N-acetylglucosamine-2-epimerase derived from Bacteroides fragilis NCTC 9343, and a method for preparing CMP-N-acetylneuraminic acid using said N-acetylglucosamine-2-epimerase. According to the present invention, CMP-N-acetylneuraminic acid can be produced economically in a large amount through a one-step reaction using cytidine monophosphate and N-acetyl-D-glucosamine which are inexpensive substrates.
    Type: Application
    Filed: December 7, 2007
    Publication date: November 24, 2011
    Applicant: GENE CHEM INC.
    Inventors: Jin Suk Woo, Jae Kyung Sohng, Byung Gee Kim, Sun Youp Kang, Dea Hee Kim, Kyoung Soon Jang, Ji Young Yang, Young Soo Jung, Won Min Seo, Tae Geon Gil, Sang Hee Shim, In Kang Hur