Patents by Inventor Leonard Casaus

Leonard Casaus 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).

  • Textured-surface quartz resonator fluid density and viscosity monitor
    Patent number: 5798452
    Abstract: A pair of thickness-shear mode resonators, one smooth and one with a textured surface, allows fluid density and viscosity to be independently resolved. A textured surface, either randomly rough or regularly patterned, leads to trapping of liquid at the device surface. The synchronous motion of this trapped liquid with the oscillating device surface allows the device to weigh the liquid; this leads to an additional response that depends on liquid density. This additional response enables a pair of devices, one smooth and one textured, to independently resolve liquid density and viscosity; the difference in responses determines the density while the smooth device determines the density-viscosity product, and thus, the pair determines both density and viscosity.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: August 25, 1998
    Assignee: Sandia Corporation
    Inventors: Stephen J. Martin, James J. Wiczer, Richard W. Cernosek, Gregory C. Frye, Charles T. Gebert, Leonard Casaus, Mary A. Mitchell
  • Quartz resonator fluid density and viscosity monitor
    Patent number: 5741961
    Abstract: A pair of thickness-shear mode resonators, one smooth and one with a textured surface, allows fluid density and viscosity to be independently resolved. A textured surface, either randomly rough or regularly patterned, leads to trapping of liquid at the device surface. The synchronous motion of this trapped liquid with the oscillating device surface allows the device to weigh the liquid; this leads to an additional response that depends on liquid density. This additional response enables a pair of devices, one smooth and one textured, to independently resolve liquid density and viscosity; the difference in responses determines the density while the smooth device determines the density-viscosity product, and thus, the pair determines both density and viscosity.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: April 21, 1998
    Assignee: Sandia Corporation
    Inventors: Stephen J. Martin, James J. Wiczer, Richard W. Cernosek, Gregory C. Frye, Charles T. Gebert, Leonard Casaus, Mary A. Mitchell