Patents by Inventor Hendrikus J. J. Theunissen

Hendrikus J. J. Theunissen 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).

  • Immunological assay with test tube having bottom forming a strip
    Patent number: 4628036
    Abstract: The present invention relates to the carrying out of immunochemical reactions in a test tube having a bottom in the shape of an inverted prism or truncated prism, in such a way that the lower edge of the tube forms a strip having a length which is at least equal to one-quarter of the distance between two opposite walls, or where appropriate to a quarter of the diameter of the test tube, as a result of which both the sensitivity and the readability are improved.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: December 9, 1986
    Assignee: Akzo N.V.
    Inventors: Antonius H. J. M. Scheepens, Hans van Hell, Hendrikus J. J. Theunissen