Patents by Inventor Clifford L. Kragt

Clifford L. Kragt 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).

  • Elution device for gel electrophoresis
    Patent number: 3989612
    Abstract: A selected fraction is eluted from an electrophoresis separation gel by contacting the opposite sides of a segment of the gel containing the selected fraction with buffer solutions and applying an electrical potential gradient across the gel. The gel segment is held between two elution windows so that the buffer solutions contact a limited area of the gel segment containing the selected fraction whereby only the selected fraction is eluted into one of the buffer solutions.
    Type: Grant
    Filed: December 26, 1974
    Date of Patent: November 2, 1976
    Assignee: The Upjohn Company
    Inventors: Clifford L. Kragt, Harold E. Ballen