Patents by Inventor Duk S. Hwang

Duk S. Hwang 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 seperating alpha-1-proteinase inhibitor from COHN IV.sub.1 +1V.sub.4 paste
    Patent number: 5616693
    Abstract: The present invention is directed to a process for purifying alpha-1-PI. The process comprises providing an impure protein fraction which comprises alpha-1-PI. The impure protein fraction is suspended in an aqueous solution at pH 6. Insoluble proteins are recovered and resuspended in aqueous solution at pH 8.5. PEG is added to precipitate .alpha.-2 proteins. To the PEG supernatant precipitation, which comprises alpha-1-PI, is added ZnCl.sub.2 to precipitate crude alpha-1-PI. The crude alpha-1-PI is resolubilized and applied to an anion-exchange medium. A fraction comprising alpha-1-PI is recovered from the anion-exchange medium. Alpha-1-PI purified by the process has a specific activity about 1.0 units/OD.sub.280.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: April 1, 1997
    Assignee: Alpha Therapeutic Corporation
    Inventors: Duk S. Hwang, Evelyn Nario, Mark Lepe, Lyndon Luz, Hirokazu Ito, Kazuo Takechi
  • Heparin enhanced process for separating antihemophilic factor (Factor VIII) and fibronectin from cryoprecipitate
    Patent number: H1509
    Abstract: A process is provided for preparing fibronectin and antihemophilic factor (Factor VIII) concentrates from a blood plasma cryoprecipitate.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: December 5, 1995
    Inventors: Harutyun Eran, Duk S. Hwang, David P. Kosow