Patents by Inventor Charles Conrad Carroll

Charles Conrad Carroll 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: 8351038
    Abstract: A first method for matching skin colors comprises measuring a spectral reflectance curve of an area of skin and determining a blend of pigments to match the skin's color by combining spectral reflectance curves measured for pigments to produce a calculated spectral reflectance curve corresponding to that of the skin. The pigment blend is then used, for example, to pigment a medical prosthesis, so that it matches precisely its wearer's skin. This method avoids the problem of metamerism in which colors that match under a first illumination no longer match under a second illumination. A second method uses a database of pigment blends generated by the first method. The color of an area of skin is measured and a pigment blend is selected from the database that provides a closest match. Apparatus for carrying out such color matching is also provided, together with palettes of suitable pigments for skin color matching.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: January 8, 2013
    Inventors: Charles Conrad Carroll, Trevor Coward
  • Publication number: 20090213379
    Abstract: A first method for matching skin colors comprises measuring a spectral reflectance curve of an area of skin and determining a blend of pigments to match the skin's color by combining spectral reflectance curves measured for pigments to produce a calculated spectral reflectance curve corresponding to that of the skin. The pigment blend is then used, for example, to pigment a medical prosthesis, so that it matches precisely its wearer's skin. This method avoids the problem of metamerism in which colors that match under a first illumination no longer match under a second illumination. A second method uses a database of pigment blends generated by the first method. The color of an area of skin is measured and a pigment blend is selected from the database that provides a closest match. Apparatus for carrying out such color matching is also provided, together with palettes of suitable pigments for skin color matching.
    Type: Application
    Filed: March 2, 2006
    Publication date: August 27, 2009
    Inventors: Charles Conrad Carroll, Trevor Coward