Patents by Inventor Thomas A. Chuhta

Thomas A. Chuhta 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: 5958661
    Abstract: The invention relates to a color photographic element comprising a red light sensitive layer comprising a cyan dye forming coupler, a green light sensitive layer comprising a magenta dye forming coupler, a blue light sensitive layer comprising a yellow dye forming coupler, wherein said magenta dye forming coupler comprises ##STR1## wherein R.sub.a and R.sub.b independently represent H or a substituent; X is hydrogen or a coupling-off group; and Z.sub.a, Z.sub.b, and Z.sub.c are independently a substituted methine group, .dbd.N--, .dbd.C--, or --NH--, provided that one of either the Z.sub.a --Z.sub.b bond or the Z.sub.b --Z.sub.c bond is a double bond and the other is a single bond, and when the Z.sub.b --Z.sub.c bond is a carbon--carbon double bond, it may form part of an aromatic ring, and at least one of Z.sub.a, Z.sub.b, and Z.sub.c represents a methine group connected to the group R.sub.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: John B. Rieger, Alphonse D. Camp, Michael R. Roberts, Thomas A. Chuhta