Patents by Inventor Tae Jin Choi

Tae Jin Choi 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 SYNTHESIZING A HALOGEN-FUNCTIONALIZED CARBON MATERIAL AND METHOD FOR FABRICATING AN ELECTRONIC DEVICE EMPLOYING THE SAME
    Publication number: 20150294907
    Abstract: Provided are methods for synthesizing a halogen-functionalized carbon material and for fabricating an electronic device employing the same. The synthesizing method of the halogen-functionalized carbon material may include thermally treating a transition metal material at a first temperature in a hydrogen atmosphere and thermally treating the transition metal material at a second temperature, which is lower than or equal to the first temperature, while further supplying halocarbon on the transition metal material.
    Type: Application
    Filed: April 9, 2015
    Publication date: October 15, 2015
    Inventors: Hyungjun KIM, Tae Jin CHOI
  • Method for preparing entecavir and intermediate used therein
    Patent number: 8569491
    Abstract: Disclosed are a novel, high-yield method for preparing entecavir and intermediates used therein.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: October 29, 2013
    Assignee: Hanmi Science Co., Ltd
    Inventors: Jae Heon Lee, Gha Seung Park, Jin Hee Kim, Tae Jin Choi, Ji Eun Lee, Jung Hee Han, Hyo Jeong Bang, Sun Young Jung, Young Kil Chang, Gwan Sun Lee, Maeng Sup Kim
  • Intermediate and process for preparing entecavir using same
    Patent number: 8569490
    Abstract: The present invention relates to a novel, high-yield and low-cost method for preparing entecavir, [1-S-(1?,3?,4?)]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one, an antiviral agent, and novel intermediates used therein.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: October 29, 2013
    Assignee: Hanmi Science Co., Ltd
    Inventors: Jaeheon Lee, Gha-Seung Park, Jin Hee Kim, Ji Eun Lee, Chul Hyun Park, Tae Jin Choi, Eun-Ju Park, Cheol Kyung Kim, Eun Jung Lim, Young-Kil Chang, Gwan Sun Lee
  • NOVEL METHOD FOR PREPARING ENTECAVIR AND INTERMEDIATE USED THEREIN
    Publication number: 20120202998
    Abstract: Disclosed are a novel, high-yield method for preparing entecavir and intermediates used therein.
    Type: Application
    Filed: September 15, 2010
    Publication date: August 9, 2012
    Applicant: HANMI HOLDINGS CO., LTD.
    Inventors: Jae Heon Lee, Gha Seung Park, Jin Hee Kim, Tae Jin Choi, Ji Eun Lee, Jung Hee Han, Hyo Jeong Bang, Sun Young Jung, Young Kil Chang, Gwan Sun Lee, Maeng Sup Kim
  • NOVEL INTERMEDIATE AND PROCESS FOR PREPARING ENTECAVIR USING SAME
    Publication number: 20110251387
    Abstract: The present invention relates to a novel, high-yield and low-cost method for preparing entecavir, [1-S-(1?,3?,4?)]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one, an antiviral agent, and novel intermediates used therein.
    Type: Application
    Filed: December 24, 2009
    Publication date: October 13, 2011
    Applicant: HANMI HOLDINGS CO., LTD.
    Inventors: Jaeheon Lee, Gha-Seung Park, Jin Hee Kim, Ji Eun Lee, Chul Hyun Park, Tae Jin Choi, Eun-Ju Park, Cheol Kyung Kim, Eun Jung Lim, Young-Kil Chang, Gwan Sun Lee
  • METHOD OF PREPARING TAXANE DERIVATIVES AND INTERMEDIATES USED THEREIN
    Publication number: 20100317868
    Abstract: The present invention relates to a novel method of preparing a taxane derivative having an anti-tumor and anti-leukemia activity, and intermediates used therein.
    Type: Application
    Filed: November 20, 2007
    Publication date: December 16, 2010
    Applicant: HANMI PHARM. CO., LTD.
    Inventors: Nam Du Kim, Wooseob Shin, Jaehyuk Jung, Dong Jun Kim, Gi Jeong Kim, Young Ho Moon, Young-Kil Chang, Gwan Sun Lee, Tae Jin Choi
  • Method for controlling spindle in optical disc device
    Patent number: 7619954
    Abstract: A method and apparatus for controlling a maximum rotational speed of a recording medium, are discussed. The method according to an embodiment of the present invention includes determining an imbalance error of the recording medium, and variably setting a maximum rotational speed of the recording medium based on the determined imbalance error.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: November 17, 2009
    Assignee: Hitachi-LG Data Storage Korea, Inc.
    Inventor: Tae Jin Choi