Patents Assigned to Diagnostic Products Corp.
  • Immunoassay of thyroxine in neonates using dried blood samples
    Patent number: 4299812
    Abstract: In the immunoassay of thyroxine using dried blood samples spotted on filter paper, the assay in this invention is run at a pH of 9.2 to 10.0, preferably at about 9.5, rather than the pH range of about 8.4 to 8.7 generally used in the art. The advantage of this higher pH range is that more accurate results are obtained with neonatal specimens. An additional advantage is that the blank or nonspecific binding is lower for many immunoassay procedures.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: November 10, 1981
    Assignee: Diagnostic Products Corp.
    Inventor: Robert F. Coombes