Patents by Inventor Changtung P. Chang

Changtung P. Chang 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 chimeric mouse-human antibodies with specificity to human tumor antigens
    Patent number: 5576184
    Abstract: Gene expression elements and their use in production of chimeric antibodies with human constant regions and murine variable regions, and mouse human chimeric antibodies having specificity to human tumor cells, methods of their production, and their use.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: November 19, 1996
    Assignee: Xoma Corporation
    Inventors: Marc D. Better, Arnold H. Horwitz, Randy R. Robinson, Shau-Ping Lei, Changtung P. Chang
  • Device for assessing nematode vitality and method for using same
    Patent number: 5023173
    Abstract: The present invention relates to a method and device for the in vitro testing of potential nematicidal and nematistatic agents, comprising treatment of nematodes with test substances, followed by assessment of the ability of the treated nematodes to move through a chemattractant gradient set up on a coated solid support, said coating comprising a gellable polymeric substrate incorporating a stabilizing agent.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: June 11, 1991
    Assignee: Xoma Corporation
    Inventors: Arnold Horwitz, Changtung P. Chang