Patents by Inventor Elmo G. Armstrong

Elmo G. Armstrong 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).

  • Immunoassay for human chorionic gonadotropin
    Patent number: 4851356
    Abstract: An immunoassay for detecting and measuring hCG in a sample includes an antibody directed to the carboxy terminal portion of the .beta. subunit of hCG and a monoclonal antibody directed to a determinant on hCG at a locus sufficiently remote from the carboxy terminal portion of the .beta. subunit of hCG that both antibodies can simultaneously bind to hCG, wherein at least one of the antibodies is delectable when both are bound to hCG.In a presently preferred embodiment, an immunoassay for hCG or hCB.beta. in urine includes a purified, labeled or detectable serum-derived antibody directed to the carboxy-terminal portion of the .beta. subunit of hCG and a matrix-bound monoclonal antibody directed to a locus on the .beta. subunit sufficiently remote from the carboxy-terminal portion that both antibodies can simultaneously bind to hCG or hCG.beta..
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: July 25, 1989
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Robert E. Canfield, Elmo G. Armstrong, Paul H. Ehrlich, Steven Birken