Patents by Inventor Yasuo Honta

Yasuo Honta 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).

  • Silver halide photographic emulsion containing silver iodobromide grains having two or more twin planes and light-sensitive silver halide color photographic material
    Patent number: 5478716
    Abstract: A silver halide emulsion is provided, which comprises silver halide twinned-crystal grains and satisfy the following requirements (1) and (2):(1) the longest distance between twin planes is within the range of 10 to 100 .ANG. on the average,(2) said silver halide grains each comprise a core comprising silver iodobromide having a silver iodide content of not less than 7 mol % and a shell comprising one or more layers different in halide composition from each other, in which at least one layer of the shell comprises silver iodobromide or silver bromide, the outermost layer having a silver iodide content of 0 to 4 mol %.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: December 26, 1995
    Assignee: Konica Corporation
    Inventors: Tadanobu Sekiya, Yasuo Honta, Syoji Matsuzaka