Patents by Inventor Jeong-Hwan Yun

Jeong-Hwan Yun 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: 8410294
    Abstract: A method for preparing highly pure anhydrous crystalline docetaxel is provided. The method for preparing highly pure anhydrous crystalline docetaxel enables preparation of anhydrous crystalline docetaxel that has purity of 99.5% or more, and is useful as an anticancer agent due to remarkably low residual solvent content compared to the standard of residual solvents in drugs.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: April 2, 2013
    Assignee: Samyang Genexbio Corporation
    Inventors: Jin-Suk Cho, Moon-Suk Kim, Jai-Young Song, Jeong-Hwan Yun, Jong-Won Yoon, Ho-Joon Choi
  • Publication number: 20130046104
    Abstract: A method for preparing highly pure anhydrous crystalline docetaxel is provided. The method for preparing highly pure anhydrous crystalline docetaxel enables preparation of anhydrous crystalline docetaxel that has purity of 99.5% or more, and is useful as an anticancer agent due to remarkably low residual solvent content compared to the standard of residual solvents in drugs.
    Type: Application
    Filed: December 27, 2010
    Publication date: February 21, 2013
    Applicant: Samyang Genexbio Corporation
    Inventors: Jin-Suk Cho, Moon-Suk Kim, Jai-Young Song, Jeong-Hwan Yun, Jong-Won Yoon, Ho-Joon Choi
  • Patent number: 6770470
    Abstract: The present invention describes a wastewater treatment method by a microorganism decomposing Tetramethyl Ammonium Hydroxide (TMAH) which, utilized in etching the surface of silicone chip in semiconductor manufacturing process, is toxic and hard to decompose. The present invention provides novel microorganisms capable of decomposing TMAH. Also, the present invention provides a treatment method for wastewater containing TMAH, using the microorganisms. The present invention is useful in industrial field as an environmental friendly wastewater treatment method by decomposing over 90% of TMAH, one of environmental contamination materials in the wastewater of semiconductor factory.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: August 3, 2004
    Assignee: Inbionet Corporation
    Inventors: Daesang Lee, Mi-Kyoung Lee, Key-Jung Kang, Chul-Soo Shin, Jeong-Hwan Yun, Do-Young Yum, Jung-Ki Lee, Kee-Don Park, Ho-Joon Choi, Bon-Tag Koo
  • Patent number: 6589765
    Abstract: The present invention relate to a method to increase the production level of paclitaxel by changing the temperature during the plant cell culture. According to the present invention, the production of the paclitaxel comprises the following procedure: (i) cultivating the Taxus genus plant cells in a medium at ca. 20 to 25° C.; and (ii) when growth of the plant cells has progressed sufficiently, changing the cultivation temperature to ca. 26 to 32° C. to continue the culture. The present invention comprises also the method of increasing the paclitaxel production by inoculating the cells at a high initial concentration and by increasing the saccharide concentration in the medium: According to the present invention, paclitaxel can be mass-produced conveniently and therefore has an industrial application.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: July 8, 2003
    Assignee: Samyang Genex Corporation
    Inventors: Ho-Joon Choi, Hyung-Kyoon Choi, Sang-Ic Kim, Jeong-Hwan Yun, Joo-Sun Son, Moon-Seok Chang, Eunsoo Choi, Hong-Rak Kim, Seung-Suh Hong, Hyun-Soo Lee
  • Publication number: 20030008377
    Abstract: The present invention describes a wastewater treatment method by a microorganism decomposing Tetramethyl Ammonium Hydroxide (TMAH) which, utilized in etching the surface of silicone chip in semiconductor manufacturing process, is toxic and hard to decompose. The present invention provides novel microorganisms capable of decomposing TMAH. Also, the present invention provides a treatment method for wastewater containing TMAH, using the microorganisms. The present invention is useful in industrial field as an environmental friendly wastewater treatment method by decomposing over 90% of TMAH, one of environmental contamination materials in the wastewater of semiconductor factory.
    Type: Application
    Filed: March 5, 2002
    Publication date: January 9, 2003
    Inventors: Daesang Lee, Mi-Kyoung Lee, Key-Jung Kang, Chul-Soo Shin, Jeong-Hwan Yun, Do-Young Yum, Jung-ki Lee, Kee-Don Park, Ho-Joon Choi, Bon-tag Koo
  • Patent number: 6248572
    Abstract: The present invention provides a method for mass production of taxol which comprises adding sugar into a culture medium containing sugar in the course of semicontinuous culture of Taxus genus plant cell, and a universal method for mass production of taxol which comprises culturing Taxus genus plant cell in a culture medium containing sugar and AgNO3 as well. In accordance with the present invention, large amount of taxol can be produced with a high yield, simply by manipulating the culture condition of Taxus genus plant cell culture.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: June 19, 2001
    Assignee: Samyang, Genex, Corporation
    Inventors: Hyung-Kyoon Choi, Tom Lee Adams, Roy William Stahlhut, Sang-Ic Kim, Jeong-Hwan Yun, Bong-Kyu Song, Jin-Hyun Kim, Jun-Seog Song, Seung-Suh Hong, Hyun-Soo Lee, Ho-Joon Choi
  • Patent number: 5871979
    Abstract: The present invention relates to a method for mass production of taxol by semi-continuous culture of Taxus genus plant with a high yield. According to the present invention, taxol can be prepared with a high yield, by employing semi-continuous culture of Taxus genus plant cell, which comprises: (i) inoculating Taxus genus plant cell on a medium containing 1 to 10% (w/v) sugar, and incubating it; and, (ii) transferring 1/10 to 1/2 volume of the culture obtained in the step (i) to a fresh medium and repeating the step (i), adding 1 to 10% (w/v) sugar to the remnant culture and incubating to the time of maximum production of taxol.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: February 16, 1999
    Assignee: Samyang Genex Co., Ltd.
    Inventors: Hyung-Kyoon Choi, Tom Lee Adams, Roy William Stahlhut, Sang-Ic Kim, Jeong-Hwan Yun, Bong-Kyu Song, Jin-Hyun Kim, Jun-Seog Song, Seung-Suh Hong, Hyun-Soo Lee