Patents by Inventor Chuen-Yang Yeh

Chuen-Yang Yeh 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).

  • Process of L-phenylalanine fermentation
    Patent number: 5614392
    Abstract: The present invention provides a process for L-phenylalanine fermentation by coryneform bacterium. The present invention successfully applies an oxystat to control the timing of feeding of molasses so as to maintain low dissolved oxygen tension and low substrate concentrations during the course of fermentation. The oxystat improves fermentation productivity appreciably. Furthermore, the present invention discovers that the proper increases of the oxygen supply rate to the culture decreases product feedback inhibition of phenylalanine formation as phenylalanine concentration increases.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: March 25, 1997
    Assignee: Food Industry Research and Development Institute
    Inventors: Chin-Hang Shu, Chuen-Yang Yeh, Pei-Ming Wang, Chii-Cherng Liao