Patents by Inventor Chul-ho Jung

Chul-ho Jung 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).

  • Publication number: 20100292356
    Abstract: Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups and acid dianhydride, obtaining polypyrrolone from the polyaminoimide, subjecting the polypyrrolone to alkaline treatment, and subjecting the alkaline-treated polypyrrolone to heat treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores.
    Type: Application
    Filed: May 15, 2009
    Publication date: November 18, 2010
    Applicant: IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chul-Ho JUNG, Sang-Hoon Han, Jae-Eun Lee, Young-Moo Lee, Ho-Bum Park
  • Publication number: 20100099804
    Abstract: Disclosed herein are polymer compounds, a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 22, 2010
    Applicant: Industry-University Cooperation Foundation, HANYANG UNIVERSITY
    Inventors: Young-Moo LEE, Ho-Bum Park, Chul-Ho Jung, Sang-Hoon Han
  • Publication number: 20090297850
    Abstract: Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyimide, and the polyimide includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride.
    Type: Application
    Filed: May 19, 2009
    Publication date: December 3, 2009
    Applicant: IUCF-HYU(Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chul-Ho Jung, Sang-Hoon Han, Young-Moo Lee, Ho-Bum Park
  • Publication number: 20090282982
    Abstract: Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyamic acid, and the polyamic acid includes a repeating unit obtained from aromatic diamine including at least one ortho-positioned functional group with respect to an amine group and dianhydride.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 19, 2009
    Applicant: IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chul-Ho JUNG, Sang-Hoon HAN, Young-Moo LEE, Ho-Bum PARK
  • Publication number: 20090286904
    Abstract: Disclosed herein are a polyamic acid dope solution composition, a method for preparing a hollow fiber using the composition and a hollow fiber prepared by the method. More specifically, disclosed are a method for preparing a hollow fiber, comprising preparing a polyamic acid dope solution composition comprising polyhydroxyamic acid, polythiolamic acid or polyaminoamic acid, spinning the composition to prepare a hollow fiber, and imidizing and thermally rearranging the hollow fiber, and the hollow fiber prepared by the method. In accordance with the method, a hollow fiber made of a high free volume polymer membrane can be prepared by spinning the dope solution composition to prepare a hollow fiber and thermally rearranging the hollow fiber via thermal treatment. The hollow fiber thus prepared exhibits excellent gas permeability and selectivity, thus being suitable for use as a gas separation membrane.
    Type: Application
    Filed: October 9, 2008
    Publication date: November 19, 2009
    Applicant: Industry-University Cooperation Foundation, HANYANG UNIVERSITY
    Inventors: Young-Moo LEE, Sang-Hoon Han, Chul-Ho Jung, Ho-Bum Park
  • Publication number: 20090286078
    Abstract: Disclosed herein are a polyimide dope solution composition, a method for preparing a hollow fiber using the composition and a hollow fiber prepared by the method. More specifically, disclosed are a method for preparing a hollow fiber, comprising preparing a polyimide dope solution composition comprising polyhydroxyimide, polythiolimide or polyaminoimide, spinning the composition to prepare a hollow fiber, and thermally rearranging the hollow fiber, and the hollow fiber prepared by the method. In accordance with the method, a hollow fiber made of a high free volume polymer membrane can be prepared by spinning the dope solution composition to prepare a hollow fiber and thermally rearranging the hollow fiber via thermal treatment. The hollow fiber thus prepared exhibits excellent gas permeability and selectivity, thus being suitable for use as a gas separation membrane.
    Type: Application
    Filed: October 9, 2008
    Publication date: November 19, 2009
    Applicant: Industry-University Cooperation Foundation, HANYANG UNIVERSITY
    Inventors: Young-Moo LEE, Sang-Hoon Han, Chul-Ho Jung, Ho-Bum Park
  • Patent number: 7098018
    Abstract: The present invention relates to novel aminopeptidase derived from Bacillus licheniformis, a gene encoding the aminopeptidase, an expression vector containing the gene, a cell transformant transfected with the expression vector and a process for preparing a natural type protein using thereof. More particularly, the present invention relates to a gene encoding aminopeptidase which is cloned and manufactured using the recombinant DNA technique, an expression vector containing the gene, a cell transformant transfected with the expression vector and a recombinant aminopeptidase which is necessary to produce recombinant human growth hormone in a natural type protein and can be expressed in a high yield more stably and advantageously, compared with conventional methods for the purification.
    Type: Grant
    Filed: July 6, 2002
    Date of Patent: August 29, 2006
    Assignee: LG Life Sciences Ltd.
    Inventors: Young-Phil Lee, Seung-won Lee, Chul-ho Jung, Hyung-Cheol Kim, Soon-Yong Choi, Jin-suk Kim, Hyun-Sik Kim, Jung-Woo Seo
  • Publication number: 20040253703
    Abstract: The present invention relates to novel aminopeptidase derived from Bacillus licheniformis, a gene encoding the aminopeptidase, an expression vector containing the gene, a cell transformant transfected with the expression vector and a process for preparing a natural type protein using thereof. More particularly, the present invention relates to a gene encoding aminopeptidase which is cloned and manufactured using the recombinant DNA technique, an expression vector containing the gene, a cell transformant transfected with the expression vector and a recombinant aminopeptidase which is necessary to produce recombinant human growth hormone in a natural type protein and can be expressed in a high yield more stably and advantageously, compared with conventional methods for the purification.
    Type: Application
    Filed: December 19, 2003
    Publication date: December 16, 2004
    Inventors: Young-Phil Lee, Seung-won Lee, Chul-ho Jung, Hyung-Cheol Kim, Song-Yong Choi, Jin-Suk Kim, Hyun-Sik Kim, Jung-Woo Seo