Patents by Inventor David L. Spooner

David L. Spooner 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).

  • Method and apparatus for determining the reflectance of translucent objects
    Patent number: 6721054
    Abstract: A method for accurately measuring the reflectance of translucent objects by illuminating small areas of the object is disclosed. The method involves determining the lateral diffusion error by use of a predetermined set of calibration standards. The lateral diffusion error is added to the uncorrected reflectance to produce the corrected reflectance value. The method has widespread potential applications in the paper, printing, textile, coating, and food industries.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: April 13, 2004
    Inventor: David L. Spooner
  • Holographic flake pigment
    Patent number: 5500311
    Abstract: Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises particles that (1) comprise an organic polymer and further comprise one or more volume phase holograms; and (2) have a thickness of about 1 micrometer to about 100 micrometers, an average diameter of about 10 micrometers to about 300 micrometers, and a thickness to diameter ratio of about 1:2 to about 1:60.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: March 19, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James G. King, Steven R. MacKara, Daniel J. Mickish, David L. Spooner
  • Holographic flake pigment
    Patent number: 5500313
    Abstract: Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises particles that (1) comprise an organic polymer and further comprise one or more volume phase holograms; and (2) have a thickness of about 1 micrometer to about 100 micrometers, an average diameter of about 10 micrometers to about 300 micrometers, and a thickness to diameter ratio of about 1:2 to about 1:60.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: March 19, 1996
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James G. King, Steven R. Mackara, Daniel J. Mickish, David L. Spooner
  • Holographic flake pigment
    Patent number: 5500310
    Abstract: Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises particles that (1) comprise an organic polymer and further comprise one or more volume phase holograms; and (2) have a thickness of about 1 micrometer to about 100 micrometers, an average diameter of about 10 micrometers to about 300 micrometers, and a thickness to diameter ratio of about 1:2 to about 1:60.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: March 19, 1996
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: James G. King, Steven R. Mackara, Daniel J. Mickish, David L. Spooner
  • Holographic flake pigment
    Patent number: 5415950
    Abstract: Holographic flake pigments, processes for making the pigments, decorative coatings comprising the pigments, and articles comprising the decorative coatings are disclosed. The pigment comprises particles that (1) comprise an organic polymer and further comprise one or more volume phase holograms; and (2) have a thickness of about 1 micrometer to about 100 micrometers, an average diameter of about 10 micrometers to about 300 micrometers, and a thickness to diameter ratio of about 1:2 to about 1:60.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: May 16, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James G. King, Steven R. Mackara, Daniel J. Mickish, David L. Spooner