Patents by Inventor Haruhika Iwano

Haruhika Iwano 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).

  • Reversal color development process
    Patent number: 4258127
    Abstract: In a reversal color development process including a black and white development and a color development, the sharpness, granularity and multilayer effect of the color photographic images formed are remarkably improved by subjecting silver halide reversal color photographic materials to black and white development in the presence of a DIR compound, i.e., a non-coupler type compound capable of releasing a development inhibitor upon development, processing the color photographic materials in an aqueous solution of a fogging agent, and then subjecting the color photographic materials to color development.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: March 24, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Ishibashi, Haruhika Iwano