Patents by Inventor William J. Litchfield

William J. Litchfield 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).

  • Specific binding assays utilizing analyte-cytolysin conjugates
    Patent number: 4517303
    Abstract: A novel analyte-cytolysin conjugate and its use in a lipid vesicle mediated measurement process is described for a wide variety of analytes present at very low concentration. The method involves forming a reaction system consisting of analyte, analyte specific binding agent, analyte-cytolysin conjugate, and vesicles containing detectable marker material in such proportions that uncombined conjugate alters the permeability of the vesicles resulting in the release and quantitative detection of marker material which can be correlated with the amount of analyte initially present.
    Type: Grant
    Filed: October 20, 1982
    Date of Patent: May 14, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: J. William Freytag, William J. Litchfield