Patents by Inventor Kazuo Wakuta

Kazuo Wakuta 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 light-sensitive material
    Patent number: H1092
    Abstract: A silver halide photographic light-sensitive material is disclosed. The silver halide emulsion layer of the light-sensitive material is sensitized in infrared region of the spectrum by a cationic di- or tri-carbocyanine sensitizing dye and a compound represented by formula I, II, or III; ##STR1## The light-sensitive material is improved in stability of the coating solution of the silver halide emulsion for standing during in its production process and also improved in stability for prolonged storage after production.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: August 4, 1992
    Inventors: Akira Kobayashi, Hiroyuki Ushiroyama, Tadashi Sekiguchi, Kazuo Wakuta, Kazuhiro Yoshida