Patents by Inventor Yong Q. Shen

Yong Q. Shen 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).

  • Production of 7-amino cephalosporanic acid with D-amino oxidase and deacylase
    Patent number: 5618687
    Abstract: An enzymatic process for the production of 7-amino cephalosporanic acid from cephalosporine C is disclosed. The process is a two-stage enzymatic reaction which can be performed in a single reactor. The invention further includes a mutant strain of Trigonopsis variabilis which produces increased amounts of D-amino acid oxidase, and a mutant strain of Acinetobacter sp., which increased amounts of deacylase, which are enzymes necessary for the present process.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: April 8, 1997
    Assignee: Biopure Corporation
    Inventors: Bing L. Wong, Yong Q. Shen