Patents by Inventor Yong-Hoon An

Yong-Hoon An 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).

  • Heterocyclic compound and organic light emitting device using same
    Patent number: 10344030
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve the service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: July 9, 2019
    Assignee: HEESUNG MATERIAL LTD.
    Inventors: Jung-Hyun Lee, Kee-Yong Kim, Yong-Hoon An, Jin-Seok Choi, Dae-Hyuk Choi, Sung-Jin Eum, Joo-Dong Lee
  • HETEROCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING SAME
    Publication number: 20170107217
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve the service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Application
    Filed: May 15, 2015
    Publication date: April 20, 2017
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Jung-Hyun LEE, Kee-Yong KIM, Yong-Hoon AN, Jin-Seok CHOI, Dae-Hyuk CHOI, Sung-Jin EUM, Joo-Dong LEE
  • Method for preparing tetrazole methanesulfonic acid salts, and novel compound used in same
    Patent number: 8940908
    Abstract: A method for preparing tetrazole methanesulfonic acid salts includes an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method is advantageous that it can shorten a reaction time and improve safety as compared to conventional methods, and can prepare high-purity tetrazole methanesulfonic acid salts at a high yield rate without using a column chromatography method.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: January 27, 2015
    Assignee: Hanmi Science Co., Ltd
    Inventors: Keuk Chan Bang, Bum Woo Park, Jong Won Choi, Jae Chul Lee, Yong Hoon An, Young Gil Ahn, Maeng Sup Kim
  • METHOD FOR PREPARING TETRAZOLE METHANESULFONIC ACID SALTS, AND NOVEL COMPOUND USED IN SAME
    Publication number: 20140148602
    Abstract: A method for preparing tetrazole methanesulfonic acid salts includes an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method is advantageous that it can shorten a reaction time and improve safety as compared to conventional methods, and can prepare high-purity tetrazole methanesulfonic acid salts at a high yield rate without using a column chromatography method.
    Type: Application
    Filed: February 3, 2014
    Publication date: May 29, 2014
    Applicant: HANMI SCIENCE CO., LTD
    Inventors: Keuk Chan BANG, Bum Woo PARK, Jong Won CHOI, Jae Chul LEE, Yong Hoon AN, Young Gil AHN, Maeng Sup KIM
  • Method for preparing tetrazole methanesulfonic acid salts, and novel compound used in same
    Patent number: 8680277
    Abstract: According to the present invention, a method for preparing tetrazole methanesulfonic acid salts comprises an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method of the present invention can shorten a reaction time and improve safety as compared to conventional methods, and can prepare high-purity tetrazole methanesulfonic acid salts at a high yield rate without using a column chromatography method.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: March 25, 2014
    Assignee: Hanmi Science Co., Ltd
    Inventors: Keuk Chan Bang, Bum Woo Park, Jong Won Choi, Jae Chul Lee, Yong Hoon An, Young Gil Ahn, Maeng Sup Kim
  • METHOD FOR PREPARING TETRAZOLE METHANESULFONIC ACID SALTS, AND NOVEL COMPOUND USED IN SAME
    Publication number: 20120330020
    Abstract: According to the present invention, a method for preparing tetrazole methanesulfonic acid salts comprises an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method of the present invention can shorten a reaction time and improve safety as compared to conventional methods, and can prepare high-purity tetrazole methanesulfonic acid salts at a high yield rate without using a column chromatography method.
    Type: Application
    Filed: January 14, 2011
    Publication date: December 27, 2012
    Applicant: HANMI SCIENCE CO., LTD
    Inventors: Keuk Chan Bang, Bum Woo Park, Jong Won Choi, Jae Chul Lee, Yong Hoon An, Young Gil Ahn, Maeng Sup Kim
  • Methods for preparing capecitabine and beta-anomer-rich trialkyl carbonate compound used therein
    Patent number: 8097706
    Abstract: The present invention relates to a method for preparing capecitabine and a method for preparing a ?-anomer-rich trialkyl carbonate compound used therein, and a highly pure capecitabine can be efficiently prepared with a high yield by the method of the present invention using the ?-anomer-rich trialkyl carbonate compound as an intermediate.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: January 17, 2012
    Assignee: Hammi Holdings Co., Ltd
    Inventors: Jaeheon Lee, Gha-Seung Park, Weon Ki Yang, Jin Hee Kim, Cheol Hyun Park, Yong-Hoon An, Yoon Ju Lee, Young-Kil Chang, Gwan Sun Lee
  • METHODS FOR PREPARING CAPECITABINE AND BETA-ANOMER-RICH TRIALKYL CARBONATE COMPOUND USED THEREIN
    Publication number: 20100249395
    Abstract: The present invention relates to a method for preparing capecitabine and a method for preparing a ?-anomer-rich trialkyl carbonate compound used therein, and a highly pure capecitabine can be efficiently prepared with a high yield by the method of the present invention using the ?-anomer-rich trialkyl carbonate compound as an intermediate.
    Type: Application
    Filed: November 7, 2008
    Publication date: September 30, 2010
    Applicant: HANMI PHARM. CO., LTD.
    Inventors: Jaeheon Lee, Gha-Seung Park, Weon Ki Yang, Jin Hee Kim, Cheol Hyun Park, Yong-Hoon An, Yoon Ju Lee, Young-Kil Chang, Gwan Sun Lee