Patents by Inventor Joan K. Givas

Joan K. Givas 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).

  • Separation technique for assays
    Patent number: 4139604
    Abstract: In an assay wherein radiolabeled substance bound to a receptor is separated from unbound radiolabeled substance, such separation is effected by the use of a combination of a particulate adsorbent and a thickening agent to decrease adsorption time. The procedure can be employed, for example, in separating bound iron from free iron in a total or unsaturated iron binding capacity assay.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: February 13, 1979
    Assignee: Becton, Dickinson and Company
    Inventors: Sidney Gutcho, Joan K. Givas
  • Radioassay of folates
    Patent number: 3988431
    Abstract: In the radioassay of folates, the standard is prepared by using folic acid (pteroyl glutamic acid; PGA) as the standard folate at a pH of 9.2 to 9.4. At such pH values, folic acid and 5-methyltetrahydrofolic acid (the predominant folate in human serum) have essentially identical reactivity towards folate binders, whereby folic acid can replace unstable 5-methyltetrahydrofolic acid standard for such assays.
    Type: Grant
    Filed: December 12, 1974
    Date of Patent: October 26, 1976
    Assignee: Becton, Dickinson and Company
    Inventors: Joan K. Givas, Sidney Gutcho