Patents by Inventor Gregory E Collins

Gregory E Collins 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).

  • Process to measure PPB levels of dissolved copper in jet fuels and other non-aqueous fluids using a colorimetric process
    Patent number: 7378281
    Abstract: A method of measuring the concentration of metal ions in a sample comprising the steps of: providing a sample comprising a nonpolar, liquid hydrocarbon, suspected of containing a metal ion; adding a dye such as a spirobenzopyran dye or bathocuproine and a reducing agent to the sample; wherein the dye forms a complex with the metal ion; wherein the complex has a spectral shift in light absorbance relative to the dye; observing the spectral shift; and calculating the concentration of the metal ion in the sample.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: May 27, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert E Morris, Qin Lu, Gregory E Collins