Patents by Inventor Glen Marshall Dappen

Glen Marshall Dappen 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).

  • Patent number: 4098574
    Abstract: An improved multilayer element for detecting glucose in samples of biological fluid which may contain with fluoride ion as a contaminant or preservative is described. The improved element comprises a buffered Trinder's reagent, which reagent comprises glucose oxidase, peroxidase, 4-aminoantipyrine and a phenolic or naphtholic coupler, which is buffered to a pH between about 4.5 and about 6.0. Such a buffering reduces any interference which may be due to fluoride ion present in the sample under analysis.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: July 4, 1978
    Assignee: Eastman Kodak Company
    Inventor: Glen Marshall Dappen
  • Patent number: 4069017
    Abstract: A colorimetric assay method for the detection of bilirubin in various liquid samples, particularly biological liquids. A multi-zone analytical element based on this assay method is also disclosed. The assay method employs an interactive mordant composition for bilirubin having one or more binding sites for bilirubin, such composition comprising a hydrophobic organic matrix and at least one charge-bearing cationic group. Upon mordanting of bilirubin by the interactive mordant composition, the mordanted bilirubin exhibits an absorption peak shift of at least 10 nm. and at least a 50% increase in molar extinction coefficient.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: January 17, 1978
    Assignee: Eastman Kodak Company
    Inventors: Tai-Wing Wu, Glen Marshall Dappen