Patents by Inventor Michael Vhrel

Michael Vhrel 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).

  • Patent number: 7580130
    Abstract: A method for determining the optimal colorant thicknesses and linear combinations for integral illuminant-weighted CIE color-matching filters is provided. A reflectance colorimeter for configuring printers may be designed using this method.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: August 25, 2009
    Assignee: Datacolor Holding AG
    Inventors: Colman Shannon, David Slocum, Michael Vhrel
  • Patent number: 7474402
    Abstract: A tristimulus colorimeter for measuring reflective or transmissive materials is provided. The colorimeter measures a sample under a calibrated light source, receives inputs to detectors, and determines CIE tristimulus values of the same sample as they would occur under a reference light source. The colorimeter includes a calibrated light source and a single silicon chip that includes three or more detectors. Each detector is permanently coated by a different mix of dyes or other colorants that form a wavelength-selective filter. A single silicon chip embodies all the detectors and electronics, with each detector coated over by deposited filter layers.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: January 6, 2009
    Assignee: Datacolor Holding AG
    Inventors: Colman Shannon, David Slocum, Michael Vhrel