Patents by Inventor Mark L. Magill

Mark L. Magill 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).

  • Photographic high contrast silver halide material and method of processing
    Patent number: 6187520
    Abstract: A high contrast photographic material free from nucleating agents comprising a support bearing a silver halide emulsion layer comprising silver halide grains and a hydrophilic colloid having a silver:hydrophilic colloid ratio above 1.9, and containing a density enhancing amine compound in the emulsion layer or an adjacent hydrophilic colloid layer wherein at least 60% of the silver halide grains are spectrally sensitized. A photographic image can be formed from the imagewise exposed material by a method comprising developing the exposed material for a time no longer than 25 seconds at a temperature no greater than 35° C.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: February 13, 2001
    Assignee: Eastman Kodak Company
    Inventors: Julia Pich, Roger H. Piggin, Mark L. Magill