Patents by Inventor Michael Weitzhandler

Michael Weitzhandler 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).

  • Anion-exchange resins including ion-exchange groups with at least two nitrogen groups, and methods of making and using same
    Patent number: 6248798
    Abstract: Anion-exchange compositions are provided comprising anion-exchange functional groups comprising at least a first and a second nitrogen group, wherein the first nitrogen group is a quaternary amine and the second nitrogen group is selected from the group consisting of primary, secondary, tertiary or quaternary amines. Methods of making and using the compositions are also provided.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: June 19, 2001
    Assignee: Dionex Corporation
    Inventors: Rosanne W. Slingsby, Christopher A. Pohl, Jacek J. Jagodzinski, Latha P. Narayanan, Michael Weitzhandler