Patents by Inventor Ralph A. J. Stevens

Ralph A. J. Stevens 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).

  • Dual isotope assays
    Patent number: 4332784
    Abstract: Dual isotope assays for thyroid function are performed by carrying out a radio-immunoassay for two of thyroxine (T4), tri-iodothyronine (T3), thyroid stimulating hormone (TSH), and thyroxine binding globulin (TBG) wherein a version of one of the thyroid components, preferably T4 or T3 is labelled with Selenium-75 and the version of the other thyroid component is labelled with a different radionuclide, preferably Iodine-125.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: June 1, 1982
    Assignee: The Radiochemical Centre Limited
    Inventors: Geoffrey F. W. Smith, Ralph A. J. Stevens, Benjamin Jacoby