Patents by Inventor Charles F. Leith

Charles F. Leith 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: 6399288
    Abstract: High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: June 4, 2002
    Assignee: Eastman Kodak Company
    Inventors: Thomas P. Larkin, Steven A. Mango, Charles F. Leith, Daniel T. Kennelly
  • Publication number: 20010038966
    Abstract: High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.
    Type: Application
    Filed: December 14, 2000
    Publication date: November 8, 2001
    Inventors: Thomas P. Larkin, Steven A. Mango, Charles F. Leith, Daniel T. Kennelly
  • Patent number: 6218091
    Abstract: High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: April 17, 2001
    Assignee: Eastman Kodak Company
    Inventors: Thomas P. Larkin, Steven A. Mango, Charles F. Leith, Daniel T. Kennelly
  • Patent number: 5578427
    Abstract: A conditioning or bleach accelerating solution can be used to process color photographic films, especially color reversal films, to minimize magenta dye fade while reducing the needed amount of formaldehyde stabilizer. This solution is provided in highly concentrated form and diluted up to 9:1 prior to or during use. The concentrate contains a formaldehyde precursor at .ltoreq.450 g/l, a sulfite at from 0 to 100 g/l, a bleach accelerating agent at .ltoreq.13.5, and a metal ion chelating agent at .ltoreq.45 g/l.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: November 26, 1996
    Assignee: Eastman Kodak Company
    Inventors: Ann M. Cullinan, Charles M. Darmon, Rosa P. Sauter, Charles F. Leith
  • Patent number: 5552264
    Abstract: A conditioning or bleach accelerating solution can be used to process color photographic films, especially color reversal films, to minimize magenta dye fade while reducing the needed amount of formaldehyde stabilizer. This solution is provided in highly concentrated form and diluted up to 9:1 prior to or during use. The concentrate contains a formaldehyde precursor at 200 to 450 g/l, a sulfite at from 40 to 100 g/l, a bleach accelerating agent at 1.5 to 13.5, and a metal ion chelating agent at 5 to 45 g/l.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: September 3, 1996
    Assignee: Eastman Kodak Company
    Inventors: Ann M. Cullinan, Charles M. Darmon, Rosa P. Sauter, Charles F. Leith