Patents by Inventor Debra A. Witkowski

Debra A. Witkowski 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).

  • Method and composition for photodynamic treatment and detection of tumors
    Patent number: 5298502
    Abstract: Disclosed is a method and a pharmaceutical composition for killing mammalian tumor cells by subjecting said cells to light in the presence of a light-activatable tetrapyrrole, in which the improvement comprises treating said cells with a compound which inhibits the enzymatic conversion of protoporphyrinogen to protoporphyrin IX by protoporphyrinogen oxidase in said cells thereby causing a buildup of protoporphyrin IX in said cells. Also disclosed is a method for the production of protoporphyrin IX which comprises growing eukaryotic microalgae in the presence of a protoporphyrinogen oxidase inhibitor.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: March 29, 1994
    Assignee: FMC Corporation
    Inventors: Blaik P. Halling, Debra A. Witkowski