Patents by Inventor Robert F. Winterkorn

Robert F. 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: 6783731
    Abstract: A spectrophotometric assay for the detection of acetaminophen in aqueous fluids is 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; and a mild oxidizing agent 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: June 22, 1995
    Date of Patent: August 31, 2004
    Assignee: Ortho-Clinical Diagnostics, Inc.
    Inventors: Thomas C. Arter, John C. Mauck, James R. Schaeffer, Robert F. Winterkorn
  • Dry analytical element for lithium assay
    Patent number: 5188802
    Abstract: A novel 14-crown 4-ether derivative is disclosed for use in a dry analytical element for assaying lithium.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: February 23, 1993
    Assignee: Eastman Kodak Company
    Inventors: James R. Schaeffer, Ronald H. Engebrecht, Robert F. Winterkorn, Harold C. Warren, III, Thomas R. Welter