Patents by Inventor Frederic N. Forehand

Frederic N. Forehand 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: 4354738
    Abstract: A front projection screen includes a substrate backing member (12), a primer (14) sprayed on the substrate, a metallic silver mixture (16) adjacent to the primer, and a mist flake mixture (20) adjacent to the mixture (16). The mixture (16) includes a combination of lacquer binder (17), mixing color agent (18) and flattening agent (19); the mist flake mixture (20) includes a combination of silver powder flakes (23) and lacquer binder (17). By selectively changing and controlling the ratios of the components of the metallic silver mixture (16) and the mist flake mixture (20), the screen's peak gain and peak gain fall off can be controlled to produce screens exhibiting a selective, high peak gain, or a constant gain independent of the viewing angle, or a gradient gain.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: October 19, 1982
    Assignee: The Singer Company
    Inventors: Frederic N. Forehand, Richard A. Mecklenborg