Patents by Inventor J. John Marshall

J. John Marshall 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).

  • Method for determination of transglucosidase
    Patent number: 4575487
    Abstract: Disclosed is a method for the determination of transglucosidase activity in glucoamylase preparations suspected of having TG activity. The method involves inhibiting the glucoamylase in the preparation with acarbose and then measuring the uninhibited TG activity by conventional means.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: March 11, 1986
    Assignee: Miles Laboratories, Inc.
    Inventors: Jayarama K. Shetty, J. John Marshall
  • .beta.-Amylase determination
    Patent number: 4550077
    Abstract: A reagent suitable for .alpha.-amylase determinations. The reagent contains a modified, blocked amylaceous polysaccharide substrate, e.g., starch glyolate, an exating by amylose, a buffer and an enzymatic glucose measuring system. The glycolate substrate is selected such that the ratio of methylated glucose to glucose is between 1:4 to 1:16. The system permits an impid assay in a single vid within 7 minutes and can be automated.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: October 29, 1985
    Assignee: Electro-Nucleonics, Inc.
    Inventors: J. Eliot Woodbridge, George F. Bulbenko, J. John Marshall