Patents by Inventor Gregory J. McGraw

Gregory J. McGraw 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).

  • Methods and devices for high-throughput dielectrophoretic concentration
    Patent number: 7666289
    Abstract: Disclosed herein are methods and devices for assaying and concentrating analytes in a fluid sample using dielectrophoresis. As disclosed, the methods and devices utilize substrates having a plurality of pores through which analytes can be selectively prevented from passing, or inhibited, on application of an appropriate electric field waveform. The pores of the substrate produce nonuniform electric field having local extrema located near the pores. These nonuniform fields drive dielectrophoresis, which produces the inhibition. Arrangements of electrodes and porous substrates support continuous, bulk, multi-dimensional, and staged selective concentration.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: February 23, 2010
    Assignee: Sandia Corporation
    Inventors: Blake A. Simmons, Eric B. Cummings, Gregory J. Fiechtner, Yolanda Fintschenko, Gregory J. McGraw, Allen Salmi
  • Methods and Devices for High-Throughput Dielectrophoretic Concentration
    Publication number: 20090045064
    Abstract: Disclosed herein are methods and devices for assaying and concentrating analytes in a fluid sample using dielectrophoresis. As disclosed, the methods and devices utilize substrates having a plurality of pores through which analytes can be selectively prevented from passing, or inhibited, on application of an appropriate electric field waveform. The pores of the substrate produce nonuniform electric field having local extrema located near the pores. These nonuniform fields drive dielectrophoresis, which produces the inhibition. Arrangements of electrodes and porous substrates support continuous, bulk, multi-dimensional, and staged selective concentration.
    Type: Application
    Filed: September 2, 2008
    Publication date: February 19, 2009
    Inventors: Blake A. Simmons, Eric B. Cummings, Gregory J. Fiechtner, Yolanda Fintschenko, Gregory J. McGraw, Allen Salmi