Patents Examined by Marantz
  • Colorimetric cholesterol assay
    Patent number: 4211531
    Abstract: A total cholesterol method includes the steps of (1) precipitation of serum proteins with a reagent containing ferric chloride in propionic acid, (2) color formation by heating aliquots of supernatant with propionic-sulfuric acid reagent, and (3) measurement of color intensities of test and standard reaction mixtures at 563 nm.
    Type: Grant
    Filed: April 20, 1979
    Date of Patent: July 8, 1980
    Assignee: Sigma Chemical Company
    Inventor: Manik L. Das