Patents by Inventor Thomas C. Voice

Thomas C. Voice 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).

  • Field-deployable cartridge method and test kit for arsenic
    Patent number: 7153698
    Abstract: A method and test for field sample arsenic speciation in aqueous solutions, in particular, arsenic speciation in drinking water, is described. In particular, the method and test uses in series three columns wherein the first column removes interfering cations from water, the second column removes dimethylarsenate (DMA) from the water, and the third column removes As(V) (collectively H3AsO4/H2AsO4?/HAsO42?/AsO43?) and monomethylarsinate (MMA) while As(III) (collectively H3AsO3/H2AsO3?/HAsO32?/AsO33?) remains in the water effluent. The bound arsenic species are separately eluted from the columns in a laboratory and then each of the eluants and the effluent are tested for the arsenic species, preferably using graphite furnace atomic absorption spectroscopy.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: December 26, 2006
    Assignee: Board of Trustees of Michigan State University
    Inventors: Thomas C. Voice, Ivan Havezov, Lisveth V. Flores del Pino, David T. Long
  • Field-deployable cartridge method and test kit for arsenic
    Publication number: 20040101971
    Abstract: A method and test for field sample arsenic speciation in aqueous solutions, in particular, arsenic speciation in drinking water, is described. In particular, the method and test uses in series three columns wherein the first column removes interfering cations from water, the second column removes dimethylarsenate (DMA) from the water, and the third column removes As(V) (collectively H3AsO4/H2AsO4−/HAsO42−/AsO43−) and monomethylarsinate (MMA) while As(III) (collectively H3AsO3/H2AsO3−/HAsO32−/AsO33−) remains in the water effluent. The bound arsenic species are separately eluted from the columns in a laboratory and then each of the eluants and the effluent are tested for the arsenic species, preferably using graphite furnace atomic absorption spectroscopy.
    Type: Application
    Filed: July 9, 2003
    Publication date: May 27, 2004
    Applicant: Board of Trustees of Michigan State University
    Inventors: Thomas C. Voice, Ivan Petzov Havezov, Lisveth V. Flores del pino, David T. Long