Patents by Inventor Mary Ellen Craver

Mary Ellen Craver 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).

  • Bleach regenerator composition and its use to process reversal color photographic elements
    Patent number: 6451519
    Abstract: A ferric-EDTA bleach regenerator composition can be mixed with bleach overflow to provide a bleach replenisher for reversal color silver halide photographic processes. The bleach regenerator composition has a critically controlled pH between about 6.0 and about 6.5, and comprises a total bromide ion concentration of at least about 210 g/l, and ferric ion in an amount of at least about 50 g/l. At least 50% of the bleach overflow and the bleach regenerator composition are mixed in at least a 1:1 volume ratio. After pH adjustment to from about 5.4 to about 5.6, the pH adjusted replenisher is supplied to the bleach tank for use in the process.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: September 17, 2002
    Assignee: Eastman Kodak Company
    Inventors: Mary Ellen Craver, Jean Marie Buongiorne, Michael John Haight
  • Photographic conditioning solution containing polyaminocarboxylic acid as sole antimicrobial agent and method of use
    Patent number: 6180327
    Abstract: A conditioning solution or bleach accelerating solution can be used to process color photographic films, especially color reversal films, to minimize magenta dye fade. This solution contains an antimicrobial composition that consists essentially of a polyaminocarboxylic acid or salt thereof as the sole antimicrobial agent. This agent is present in an amount of less than about 3 g/l.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: January 30, 2001
    Assignee: Eastman Kodak Company
    Inventors: Hugh Gerald McGuckin, John Stuart Badger, Mary Ellen Craver
  • Photographic bleach regenerator composition formulated with bromide ion from two sources
    Patent number: 5834170
    Abstract: A ferric-EDTA bleach regenerator composition can be made with bleach overflow to provide a bleach replenisher for reversal color silver halide photographic processes. The bleach regenerator composition has a critically controlled pH between about 6.0 and about 6.5, and comprises a total bromide ion concentration of at least about 210 g/l, and ferric ion in an amount of at least about 50 g/l. At least 50% of the bleach overflow and the bleach regenerator composition are mixed in at least a 1:1 volume ratio. After pH adjustment to from about 5.4 to about 5.6, the pH adjusted replenisher is supplied to the bleach tank for use in the process.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: November 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Mary Ellen Craver, Jean Marie Buongiorne, Michael John Haight
  • Bleach regenerator composition and its use to process reversal color photographic elements
    Patent number: 5652087
    Abstract: A ferric-EDTA bleach regenerator composition can be mixed with bleach overflow to provide a bleach replenisher for reversal color silver halide photographic processes. The bleach regenerator composition has a critically controlled pH between about 6.0 and about 6.5, and comprises a total bromide ion concentration of at least about 210 g/l, and ferric ion in an amount of at least about 50 g/l. At least 50% of the bleach overflow and the bleach regenerator composition are mixed in at least a 1:1 volume ratio. After pH adjustment to from about 5.4 to about 5.6, the pH adjusted replenisher is supplied to the bleach tank for use in the process.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: July 29, 1997
    Assignee: Eastman Kodak Company
    Inventors: Mary Ellen Craver, Jean Marie Buongiorne, Michael John Haight