Patents by Inventor Greg E. Collins

Greg 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
    Publication number: 20030166292
    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: Application
    Filed: January 31, 2003
    Publication date: September 4, 2003
    Inventors: Greg E. Collins, Robert E. Morris
  • Chelators exhibiting triple fluorescence
    Patent number: 6143569
    Abstract: A polyfunctional amine, such as cyclam, substituted with 4-(N,N-dimethylao) benzonitrile, exhibits triple fluorescence and complexes with metal ions. The complexation of metal ions with the fluorophore changes the triple fluorescence characteristics of the fluorophore. Thus, this substituted polyfunctional amine provides an effective indicator for the qualitative and quantitative detection of metals.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: November 7, 2000
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Greg E. Collins, Ling-Siu Choi