Patents by Inventor Yoshio Nishina

Yoshio Nishina 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: 4211835
    Abstract: A method of processing light-sensitive silver halide photographic material to be treated with a developing solution containing no hydroquinones developing agent, which material comprises a support, a silver halide emulsion layer coated thereon containing silver halide grains having an average grain size of 0.1 to 0.8.mu., at least 75% of said grains being within a range of 0.6 to 1.4 times the said average grain size, and a tetrazolium specified compound.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: July 8, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshio Nishina, Syunji Matsuo, Toshio Nagatani, Kazuo Takahashi, Takeshi Habu
  • Patent number: 4192682
    Abstract: Process of forming a high-contrast silver image which process comprises treating a light-sensitive silver halide photographic material comprising a support, a silver halide emulsion layer coated thereon and another hydrophilic colloidal layer, at least one of which contains a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent, with a developer containing no hydroquinone developing agent after exposed imagewise.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: March 11, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshio Nishina, Syunji Matsuo, Toshio Nagatani, Kazuo Takahashi, Takeshi Habu
  • Patent number: 4121935
    Abstract: A lith-type silver halide photographic light-sensitive material for forming halftone dot images is disclosed which contains a sensitizing dye represented by the following general formula: ##STR1## WHEREIN Z.sub.1 is an atomic group necessary for forming a naphthothiazole ring, Z.sub.2 is an atomic group necessary for forming a member selected from a group consisting of substituted or unsubstituted, benzothiazole, benzoselenazole, naphthothiazole and naphthoselenazole nucleus, R.sub.1 and R.sub.2 are respectively a substituted or unsubstituted alkyl group, X.sup..theta. is an anion, and n is a positive integer of 1 or 2 with the proviso that when the dye is an inner salt, n is 1.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: October 24, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshio Nishina, Teiji Habu, Tomio Nakajima, Akio Oshima, Eiichi Sakamoto, Noboru Fujimori, Kiyomitsu Mine, Hiroo Toya