Patents by Inventor Paul N. Fielder

Paul N. Fielder 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).

  • Method for differentiating the source of occult gastrointestinal bleeding
    Patent number: 5460969
    Abstract: The presence of fecal occult blood in a stool sample is detected by mixing a liquid stool sample with an acidic liquid, such as a phosphate/citrate buffer, to precipitate hematin from the solution. The precipitated hematin is separated and the presence or absence of hemoglobin is determined by exposing the solution to a peroxidase diagnostic assay. A positive response indicates the presence of blood originating in the lower gastrointestinal tract, a leading indicator of lower GI cancer.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: October 24, 1995
    Inventors: Paul N. Fielder, Robert A. Levine, Stephen C. Wardlaw