Patents by Inventor Bruce J. Nielsen

Bruce J. Nielsen 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).

  • Aromatic hydrocarbon optrodes for groundwater monitoring applications
    Patent number: 5268972
    Abstract: Fiber optic based optrodes suitable for in-situ monitoring of groundwater and earth material for the presence of aromatic hydrocarbons. The optrodes are fabricated with porous optical waveguides which are impregnated with a chemical indicator whose optical transmission properties change in the presence of aromatic species, providing a high degree of chemical specificity.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: December 7, 1993
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Mary E. Tabacco, Bruce J. Nielsen