Patents by Inventor Alexander J. Fielding

Alexander J. Fielding 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).

  • Multi-spectral optical method and system for detecting and classifying biological and non-biological particles
    Patent number: 7106442
    Abstract: Enhanced methods, apparatuses and systems are disclosed for the real-time detection and classification of biological and non-biological particles by substantially simultaneously measuring a single particle's characteristics in terms of size and density, elastic scattering properties, and absorption and fluorescence.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: September 12, 2006
    Inventors: David B. Silcott, Alexander J. Fielding
  • Optical fiber evanescent field excited fluorosensor and method of manufacture
    Patent number: 6558958
    Abstract: An optical fiber is tapered, preferably adiabatically, and has a material coated on it for chemical bonding with fluorophores. When the fluorophores couple with the material, evanescent radiation generated fibers causes the fluorophores to fluoresce, and the fluorescence is coupled back into the fiber.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: May 6, 2003
    Assignee: University of Maryland
    Inventors: Saeed Pilevar, Christopher C. Davis, Alexander J. Fielding, Frank Portugal
  • Optical fiber evanescent field excited fluorosensor and method of manufacture
    Patent number: 6103535
    Abstract: An optical fiber is tapered, preferably adiabatically, and has a material coated on it for chemical bonding with fluorophores. When the fluorophores couple with the material, evanescent radiation generated fibers causes the fluorophores to fluoresce, and the fluorescence is coupled back into the fiber.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: August 15, 2000
    Assignee: University of Maryland
    Inventors: Saeed Pilevar, Christopher C. Davis, Alexander J. Fielding, Frank Portugal