Patents Assigned to NHH Biologics
  • Vitamin D assay
    Patent number: 5821020
    Abstract: The present invention provides a method of assaying a sample of blood or blood components, in particular serum, for the presence of 1,25-dihydroxy-vitamin D comprising removing proteins from the sample, incubating the protein-free sample with a salt of periodic acid, isolating 1,25-dihydroxy-vitamin D from the periodate-treated sample, and determining the concentration of 1,25-dihydroxy-vitamin D.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: October 13, 1998
    Assignee: NHH Biologics
    Inventor: Bruce Warren Hollis