Patents by Inventor Varadh Ranganathan

Varadh Ranganathan 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).

  • Nanostructured re-doped SiO-base fluorescent materials and methods for production of same
    Patent number: 7407604
    Abstract: A new class of nanostructured RE-doped SiO2-base materials that display superior fluorescence properties is provided. In particular, high gain combined with a broad and flat spectral band width is observed in material composed of a high fraction of a nano-dispersed metastable silicate phase in a glassy SiO2 matrix, produced by partial devitrification (crystallization) of several glassy Al2O3/Er2O3- and Y2O3/Er2O3-doped SiO2 compositions. Also, a highly deconvoluted spectral emission, with several prominent peaks, is observed in completely devitrified material, consisting of a uniform nano-dispersion of an equilibrium silicate phase in a crystobalite SiO2 matrix. Such enhanced fluorescence properties were observed in heat treated nanopowders prepared by vapor-phase, solgel, rapid solidification, and spray-pyrolysis methods.
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: August 5, 2008
    Assignee: Rutgers The State University of New Jersey
    Inventors: Bernard H. Kear, Christopher D. Haines, George H. Sigel, Lisa C. Klein, Varadh Ranganathan
  • Nanostructured re-doped SiO2-base fluorescent materials and methods for production of same
    Publication number: 20050152824
    Abstract: A new class of nanostructured RE-doped SiO2-base materials that display superior fluorescence properties is provided. In particular, high gain combined with a broad and flat spectral band width is observed in material composed of a high fraction of a nano-dispersed metastable silicate phase in a glassy SiO2 matrix, produced by partial devitrification (crystallization) of several glassy Al2O3/Er2O3- and Y2O3/Er2O3-doped SiO2 compositions. Also, a highly deconvoluted spectral emission, with several prominent peaks, is observed in completely devitrified material, consisting of a uniform nano-dispersion of an equilibrium silicate phase in a crystobalite SiO2 matrix. Such enhanced fluorescence properties were observed in heat treated nanopowders prepared by vapor-phase, solgel, rapid solidification, and spray-pyrolysis methods.
    Type: Application
    Filed: January 5, 2005
    Publication date: July 14, 2005
    Inventors: Bernard Kear, Christopher Haines, George Sigel, Lisa Klein, Varadh Ranganathan