Patents by Inventor Stephen J. Pentoney, Jr.

Stephen J. Pentoney, Jr. 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).

  • Capillary column containing removable separation gel composition and method of use
    Patent number: 5370777
    Abstract: Disclosed herein are capillary columns for capillary electrophoretic analysis of sample constituents. In an embodiment, the columns comprise a bifunctional layer comprising a positively charged amine group adsorbed to the inner wall of the capillary and an active functional group; a gel composition; hydrophilic polymer; and a separation composition capable of being removed from the column, interspersed within the remainder of the column. The disclosed columns are particularly well suited for the analysis of surfactant: proteinaceous material complexes, nucleic acid sequence, and analysis of restriction fragments according to size.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: December 6, 1994
    Assignee: Beckman Instruments, Inc.
    Inventors: Andras Guttman, Chia-Hui Shieh, Barry L. Karger, Stephen J. Pentoney, Jr., Kenneth D. Konrad, Sushma Rampal, Katalin Ganzler