Patents by Inventor James Callis

James Callis 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).

  • Dual-luminophor compositions and related methods
    Publication number: 20060160241
    Abstract: A dual-luminophor compositions that include a first luminescent compound having a luminescent emission that is sensitive to oxygen concentration, a second luminescent compound having a luminescent emission that is insensitive to oxygen concentration, and an oxygen-permeable host material; and method for measuring the pressure of an oxygen-containing fluid using the dual-luminophor composition.
    Type: Application
    Filed: May 19, 2005
    Publication date: July 20, 2006
    Inventors: Gamal-Eddin Khalil, Martin Gouterman, Colin Costin, James Callis, Sang Im, Younan Xia
  • Method and apparatus for assaying wood pulp fibers
    Publication number: 20050019948
    Abstract: Paper pulp is added to a stain solution. The stain solution and pulp fibers are mixed to form a slurry. Samples are removed from the slurry and are admixed with dilution water and a bleach. Then, the fibers are moved into a flow cell where they are subjected to a light source adapted to stimulate fluorescence from the stained pulp fiber. Before the fiber slurry enters the flow cell it is mixed with a dilution water of bleach to reduce background fluorescence. The fluorescent light is collimated and directed through a dichroic filter onto a fluorescence splitting dichroic filter.
    Type: Application
    Filed: February 26, 2004
    Publication date: January 27, 2005
    Inventors: Richard Gustafson, James Callis, Jeffrey Mathews, John Robinson, Carsten Bruckner, Kuntinee Suvamakich