Patents by Inventor Kathryn S. Schwenzer

Kathryn S. Schwenzer 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).

  • Compounds having improved fluorescence in fluorescence polarization immunoassays and immunoassays utilizing same
    Patent number: 5315015
    Abstract: Compounds of the formula ##STR1## wherein F is a fluorescing compound; Y is --NH-- or a single covalent bond; Z is a straight or branched alkylene chain of 2 to 10 carbon atoms which is substituted by at least one hydrophilic group; Q is oxygen or sulfur; and X is a ligand-analog, the ligand-analog capable of being recognized by an antibody specific to the corresponding ligand. These compounds have improved properties in fluorescence polarization immunoassays by possessing either a better intensity and/or a larger span.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: May 24, 1994
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Raymond A. Hui, Kathryn S. Schwenzer
  • Precipitation of protein
    Patent number: 4171204
    Abstract: A method for analyzing blood serum or plasma wherein the blood serum or plasma is treated with about 1.4 or more volumes of acetonitrile, propionitrile, tetrahydrofuran or mixtures thereof to precipitate proteins and to provide a supernatant. The separated supernatant is subsequently examined for a component of interest.
    Type: Grant
    Filed: September 1, 1978
    Date of Patent: October 16, 1979
    Assignee: Abbott Laboratories
    Inventors: Kathryn S. Schwenzer, Susan E. Magic