Patents by Inventor Robert Francis Winterkorn

Robert Francis Winterkorn 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).

  • Dry analytical element for acetaminophen assay
    Patent number: 6015683
    Abstract: A spectrophotometric assay for the detection of acetaminophen in aqueous fluids can be carried out with a dry analytical element. The element comprises a support having thereon one or more reagent layers containing a first enzyme, aryl acylamidase, to cleave the amide bond of acetaminophen to produce p-aminophenol; a second enzyme, ascorbic acid oxidase, to oxidize the p-aminophenol so that it couples to a water soluble coupling agent to form a dye that is read at 670 nm. The assay is precise, accurate on serum and plasma samples, and relatively free from significant interferences. The element also allows measurement over a broad dynamic range.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: January 18, 2000
    Assignee: Clinical Diagnostic Systems, Inc.
    Inventors: James Robert Schaeffer, John Charles Mauck, Robert Francis Winterkorn, Thomas Charles Arter