Patents by Inventor Richard W. Detrick

Richard W. Detrick 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).

  • Security paper and method of manufacturing the same
    Patent number: 5161829
    Abstract: A security paper includes at least two layers of paper each having inner and outer surfaces and predetermined mechanical properties, color and optical density. Authentication indicia is printed on the inner surface of at least one layer. The indicia is formed of a chemically, mechanically and thermally stable medium having a predetermined color, color intensity and optical density. A chemically, mechanically and thermally stable adhesive permanently adheres the inner surfaces of the layers together. The adhesive has a predetermined color and optical density. The color and optical density of the layers, the color, color intensity and optical density of the medium and the color and optical density of the adhesive combine to render the authentication indicia detectable in transmitted light and substantially imperceptible in reflected light.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: November 10, 1992
    Assignee: James River Corporation of Virginia
    Inventors: Richard W. Detrick, Robert Patterson, Kim W. Robinson