Patents by Inventor Hyei-Jha Chung

Hyei-Jha Chung 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 preparing substituted carbamates and intermediates thereof
    Publication number: 20050288343
    Abstract: An improved process of preparing substituted carbamate derivatives, and crystalline forms thereof, useful for the treatment of dyslipidemia and diabetes, and intermediates thereof are provided.
    Type: Application
    Filed: May 16, 2005
    Publication date: December 29, 2005
    Inventors: Andrew Rusowicz, Gregory Lane, Manohar Saindane, Hyei-Jha Chung, Mary Malley
  • Process employing controlled crystallization in forming crystals of a pharmaceutical
    Publication number: 20050256314
    Abstract: A process is provided which employs reactive controlled crystallization to produce drug substance having desirable crystal properties which process involves providing reactants A and B in liquid or solution form and adding reactant B to reactant A using a cubic or incremental addition technique to control extent of reaction and thus crystallization kinetics, including supersaturation and nucleation, to produce crystals of drug substance which are generally larger, better quality and with few fines and narrow particle size distribution than normally obtainable employing prior art crystallization techniques. In addition, crystals of drug substance produced by the above process is also provided.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 17, 2005
    Inventors: Soojin Kim, Chenkou Wei, Mark Lindrud, Hyei-Jha Chung
  • Fused pyridopyridazine inhibitors of cGMP phosphodiesterase
    Patent number: 6316438
    Abstract: Compounds of the formula are useful as inhibitors of cGMP PDE especially Type 5.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: November 13, 2001
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Guixue Yu, John Macor, Soojin Kim, Hyei-Jha Chung, Michael Humora, Kishta Katipally, Yizhe Wang