Patents by Inventor Nicholas D. Vlachakis

Nicholas D. Vlachakis 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).

  • Radioenzymatic method for assaying 3,4-dihydroxyphenylglycol
    Patent number: 4311790
    Abstract: A method for assaying 3,4-dihydroxyphenylglycol in a sample containing other catechol compounds by forming tritiated O-methylated derivatives, extracting tritiated 3-methoxy-4-hydroxyphenylglycol at a pH of 5 or lower, isolating the tritiated 3-methoxy-4-hydroxyphenylglycol and measuring its radioactivity. Prior to measurement, the tritiated 3-methoxy-4-hydroxyphenylglycol can be oxidized to tritiated vanillin which is extracted into the counting solution to increase specificity of the assay.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: January 19, 1982
    Assignee: The University of Southern California
    Inventor: Nicholas D. Vlachakis