Patents by Inventor Bhi-Yung Cheng

Bhi-Yung Cheng 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).

  • Aqueous quinolone concentration assay
    Patent number: 5284776
    Abstract: A method of determining the concentration of a quinolone in an aqueous solution comprising reacting the quinolone with an iron salt under conditions and for a time period sufficient to form a color change in the aqueous solution and comparing the resulting color change to an appropriate standard, and optionally comprising the further step of adjusting the pH of the aqueous quinolone solution to a value of less than about 7.0 prior to reacting the aqueous solution with an iron salt, as well as a test kit useful for carrying out such a method.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: February 8, 1994
    Assignee: Abbott Laboratories
    Inventors: James J. Napier, Mark R. Holst, Bhi-Yung Cheng