Patents by Inventor Hajime Nakagawa

Hajime Nakagawa 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: 5376512
    Abstract: There is disclosed a silver halide color photographic material, which comprises, in a yellow color-forming silver halide emulsion layer, one of nondiffusible yellow couplers represented by formula (I-1) or (I-2) and an organic compound represented by formula (II), or further an organic compound represented by formula (III): ##STR1## wherein X.sup.1 and X.sup.2 each represent an alkyl group, an aryl group, or a heterocyclic group, X.sup.3 represents an organic residue to form a nitrogen-containing heterocyclic group together with the >N--, Y represents an aryl group or a heterocyclic group, and Z represents a hydrogen atom or a coupling-releasing group, ##STR2## wherein R.sup.4, R.sup.5, R.sup.6, and R.sup.7 each represent a hydrogen atom, an aliphatic group, an aromatic group, an aliphatic-oxycarbonyl group, an aromatic-oxycarbonyl group, or a carbamoyl group, provided that each of R.sup.4, R.sup.5, R.sup.6, and R.sup.7 does not represent a hydrogen atom at the same time, ##STR3## wherein R.sup.8, R.sup.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: December 27, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hajime Nakagawa, Yasuhiro Yoshioka
  • Patent number: 5328817
    Abstract: There is disclosed a silver halide color photographic material which comprises at least one yellow coupler represented by the following formulas (1) or (2), and at least one cyan coupler represented by the following formula (C): ##STR1## wherein X.sup.1 and X.sup.2 each represent an alkyl group, an aryl group, or a heterocyclic group, X.sup.3 represents an organic residue required to form a nitrogen-containing heterocyclic group together with >N--, Y represents an aryl group or a heterocyclic group, and Z represents a group capable of being released upon a coupling reaction of the coupler represented by said formula with the oxidized product of a developing agent, ##STR2## wherein R.sub.1 represents an alkyl group, an aryl group, or a heterocyclyc group, R.sub.2 represents an alkyl group having 2 or more carbon atoms, R.sub.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: July 12, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hajime Nakagawa, Yasuhiro Yoshioka
  • Patent number: 5140979
    Abstract: A massager for giving vibratory hits on a skin face. A multiplicity of stimulative projections each having an acute apex are provided on an impingement vibrating member impinging on the skin face. The impingement vibrating member is fitted with an ion electrode for energizing pointwise the minus ions on the skin face. The ion electrode is formed with an energizing projection, whereby the minus ions act pointwise on the skin face.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: August 25, 1992
    Assignee: Shin-Atsu-Shin Clinic, Inc.
    Inventor: Hajime Nakagawa
  • Patent number: 5043254
    Abstract: A method for forming an image comprises processing a silver halide color photosensitive material comprising a nondiffusible coupler and a nondiffusible color developing agent on a support with a color developer containing a diffusible color developing agent comprising an aromatic primary amine. By this method, it is possible to reduce the processing time required when a color developer containing an ordinary aromatic primary amine as the color developing agent is used and also to provide a stable image forming method having only a slight processing dependence.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: August 27, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hajime Nakagawa, Yasuhiro Yoshioka, Takatoshi Ishikawa, Genichi Furusawa, Nobutaka Ohki
  • Patent number: 4334921
    Abstract: An improved converter steelmaking process that achieves a great increase in the refining capability of top-blown oxygen is provided. The process applies to an oxygen top-blowing converter that also permits bottom blowing of gas and it is characterized by supplying oxygen from a top-blowing lance and a bottom-blowing nozzle substantially throughout the refining operation, with 2 vol. % to less than 17 vol. % of a predetermined total oxygen flow rate being supplied from the bottom-blowing nozzle whereas the remaining part of oxygen is blown onto the surface of the hot metal from the top-blowing lance.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: June 15, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Masazumi Hirai, Kazuo Okohira, Shozo Murakami, Hajime Nakagawa