Patents by Inventor Hyung Hwan Hyun

Hyung Hwan Hyun 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).

  • Candida magnoliae producing mannitol and fermentation method for producing mannitol
    Patent number: 6528290
    Abstract: The present Invention is to provide a novel strain, Candida magnoliae (KCCM-10252) producing mannitol isolated from the fermentation sludge collected from a xylitol manufacturing company, and further a method for manufacturing mannitol with high yield and high productivity by optimizing various culture conditions and medium composition using the new strain, Candida magnoliae.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: March 4, 2003
    Assignees: BioNgene Co., Ltd., Bolak Co., Ltd.
    Inventors: Kyung Hwa Song, Hong Baek, Song Mi Park, Hyung Hwan Hyun, Soo Ryun Jung, Sang Yong Kim, Jung Kul Lee, Ji Yoon Song
  • Regulation and enhancement of enzyme production
    Patent number: 4737459
    Abstract: A method is disclosed for producing catabolite repression-resistant mutant strains of C. thermosulfurogenes and C. thermohydrosulfuricum. The method comprises challenging a wild strain of the organism with nitrosoguanidine, followed by enrichment on 2-deoxyglucose and culturing an iodine stained starch-glucose containing agar. The colonies which convert starch most efficiently are catabolite repression-resistant. Pure cultures of the mutants and methods employing the mutants to prepare enzymes are also described.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: April 12, 1988
    Assignee: Michigan Biotechnology Institute
    Inventors: Joseph G. Zeikus, Hyung-Hwan Hyun
  • Thermostable beta-amylase
    Patent number: 4647538
    Abstract: A thermostable and thermoactive, extracellular .beta.-amylase is produced by Clostridium thermosulfurogenes. Methods of producing the .beta.-amylase and using it to convert starch to maltose are also disclosed.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: March 3, 1987
    Assignee: Michigan Biotechnology Institute
    Inventors: Joseph G. Zeikus, Hyung-Hwan Hyun
  • Thermostable starch converting enzymes
    Patent number: 4628031
    Abstract: A thermostable pullulanase and a thermostable glucoamylase are produced by Clostridium thermohydrosulfuricum. Methods of producing the enzymes and using them to hydrolyze starch are also disclosed.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: December 9, 1986
    Assignee: Michigan Biotechnology Institute
    Inventors: Joseph G. Zeikus, Hyung-Hwan Hyun
  • Co-culture production of thermostable enzymers and ethanol
    Patent number: 4604352
    Abstract: Starch is converted directly to ethanol by growing a co-culture of Clostridium thermosulfurogenes and Clostridium thermohydrosulfuricum under anaerobic conditions on a starch containing substrate in a medium comprising essential vitamins, minerals and growth factors. The co-culture also produces the thermostable enzymes .beta.-amylase, glucoamylase and pullulanase.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: August 5, 1986
    Assignee: Michigan Biotechnology Institute
    Inventors: Joseph G. Zeikus, Hyung-Hwan Hyun