Patents by Inventor Diane P. Libby

Diane P. Libby 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).

  • Color reversal photographic elements adapted for underwater photography
    Patent number: 5382499
    Abstract: A photographic film is disclosed particularly adapted for underwater photography. The film is comprised of a film support, a blue recording layer unit capable of forming a yellow dye image, a green recording layer unit capable of forming a magenta dye image, and a red recording layer unit capable of forming a cyan dye image. At an exposure temperature of 5500.degree. K. and an optical density of 0.8 above minimum density the red recording layer unit exhibits a speed that is (T/10) log E greater than that of the green recording layer unit, where E is exposure in lux-seconds and T is the light transmission distance in meters through water required to match the speed of the red recording layer unit to the speed of the green recording layer unit, T being in the range of from 1.5 to 15 meters.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: January 17, 1995
    Assignee: Eastman Kodak Company
    Inventors: Brian W. Keelan, Robert Niklewicz, Diane P. Libby, John V. Nelson