Patents by Inventor Johannes Kerkhof

Johannes Kerkhof 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).

  • Unit for the detection of residues of antibacterial compounds in liquids
    Patent number: 5494805
    Abstract: The detection of residues of antibacterials such as antibiotics and sulpha compounds in liquids such as milk, water, meat juice, serum or urine is disclosed. A test unit comprises an agar medium inoculated with a suitable test organism and two or more redox indicators.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: February 27, 1996
    Assignee: Gist-Brocades N.V.
    Inventors: Ferdinand T. Van Rijn, Robert Beukers, Johannes Kerkhof