Patents by Inventor Yunn B. Yang

Yunn B. Yang 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 for making D-aminoacylase
    Patent number: 5206162
    Abstract: A process for making D-aminoacylse includes adding 1% N-acetyl-DL-amino acid preferably N-acetyl-DL-methionine and N-acetyl-DL-leucine in a culturing medium incubated with bacteria selected from the strain of Alcaligenes faecalis for culturing the bacteria and for inductively promoting an enzyme reaction to produce the D-aminoacylase which is able to hydrolyze D-amino acids and unable to hydrolyze L-amino acids.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: April 27, 1993
    Assignee: National Science Council of Republic of China
    Inventors: Ying C. Tsai, Chyuan S. Lin, Ching P. Tseng, Yunn B. Yang
  • Process for making L-aminoacylase
    Patent number: 5194383
    Abstract: A process for making L-aminoacylase includes a cultivation of microorganism selected from a specy of Alcaligenes, especially the Alcaligenes denitrificans DA 181, and a separation of a produced L-aminoacylase from the bacterial cells for obtaining the L-aminoacylase which may be further purified for the production of L-amino acid. The acylase made by such a process may have an increased stability, beneficial for its commercial and medical values.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: March 16, 1993
    Assignee: National Science Council of Republic of China
    Inventors: Tsai, Ying C., Hsiang L. Hu, Yunn B. Yang