Patents by Inventor Kwok P. Ho

Kwok P. Ho 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).

  • Processes for in vivo production of astaxanthin and phaffia rhodozyma yeast of enhanced astaxanthin content
    Patent number: 5182208
    Abstract: An economical process for in vivo production of the pigment astaxanthin, and particularly a process for enhancing astaxanthin content of cultures of microorganisms of genus Phaffia, the process comprising culturing a microorganism of genus Phaffia in a nutrient medium containing an antibiotic, a cytochrome B inhibitor, or a terpenoid synthetic pathway inhibitor, cultivating surviving pigment enhanced microorganisms, and harvesting the yeast.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: January 26, 1993
    Assignee: Igene Biotechnology, Inc.
    Inventors: Eric A. Johnson, David Schreiber, Kwok P. Ho, William T. Hall, Huei-hsiung Yang, Beril Geldiay-Tuncer